George Washington

George Washington

It is impossible to reflect on the truly great leadership that has been one of the real blessings of this nation without including the name of George Washington in that list.  In fact, in almost anyone’s “top ten” list of truly great presidents, Washington would almost certainly top the list.  His stature in American history is legendary and the respect Americans have for this their first president borders on adoration of myth.

In fact, there is a lot of myth and some humor about our first president that reflects the love people have for this great leader.  From the many quips about his supposed wooden teeth to the thousands of places around the nation that proclaim “George Washington slept here”, to the mythical story of how he threw a silver dollar across the Potomac as a child or his response when he was caught cutting down a cheery tree and responded to the accusation “I cannot tell a lie”, Washington’s myth is strong in the national memory of this great leader.

Washington never set out to become the greatest president of all time or even to be in a position of leadership in the new country he helped to start.  He was the one who originated the concept of a “citizen president” and he believed so strongly in that concept that he refused to run for a third term because his time as citizen leader was over.  This tradition was sustained with little exception until it was codified into part of our constitution in the form of the 22nd amendment.

But before Washington was a great political leader, he showed his tremendous leadership skills on the field of battle.  He learned the art of warfare serving honorably in the French and Indian war and his influence and the respect he had earned during that conflict netted him the title of commander and chief of the American Army when the continental congress created that role in 1775.  Small wonder when he ascended to the presidency some years later, he carried the responsibility of commander and chief with him to the presidency where it continues to reside today even though few of our modern presidents have the military credentials of Washington.

When commanding the troops during the revolutionary war, a famous incident that has been captured beautifully by artists was his decision to cross the Delaware in New Jersey to stage a surprise attack and win the battle against the British.  It was yet another brilliant maneuver that showed his firm grasp of military strategy and only served to add to his fame and reputation as an outstanding leader of men.

After the war, Washington again was interested in retiring from public life but he was never one to turn away when his nation needed him.  And needed him it did as he presided over the Continental Congress to assure the successful drafting of the US Constitution.  Of the many great accomplishments of his life, his ability to provide leadership and inspiration to that assembly to produce this masterpiece of American political ligature would certainly be ranked as perhaps his finest hour.

George Washington was rewarded for his superior leadership skills when he was given the awesome responsibility of serving as the nations first President of the United States.  His wisdom and insight into what the nation needed at east stage of its early development made him the man of the hour for a struggling republic.  Few recognize that one of his greatest contributions to the presidency was recognizing that the nation was torn and weary of war.  So using his considerable influence and negotiating skills, Washington signed a number of important treaties that resulted in years of peace that were needed to turn the country from thoughts of war to thoughts of building a great nation.

Washington never tired of providing leadership for two terms as the first American president and it was he who decided not to serve a third term and returned once again to private life.  But his impact on the nation and the world was profound and long lasting.  It was the kind of nation shaping influence that truly earned him the title associated to him to this day of “father of the nation.”

John F. Kennedy

In the life of this great nation, a few of its presidents have emerged from the pack as truly historic and memorable even more than others.  Of course, the presidents from the generation of the founding fathers certainly fit that bill including George Washington and Thomas Jefferson.  And presidents that served the country in times of great crisis also are deeply honored in memory.  But in recent memory, there probably no other president that brings up emotions of respect and admiration as much as that of John F. Kennedy.

Kennedy seemed to capture the hearts of the American people in a way that was unique in presidents before or since.  Part of it may have been the era in history that the country was in when he became the President of the United States.  The historic time between 1950 and 1970 was a time when the largest generation of youth, now known as the “baby boomers”, was coming of age.  With them a new youth movement brought a sense of optimism, a “can do” attitude and to some extent a sense of revolution.  They were looking for new ways of seeing things, a new vision of the future and new leadership and John F. Kennedy was the perfect man of the hour to provide that leadership.

So much about Kennedy’s presidency has an aura of romance and almost a fairy tale excitement of it.  From the naming of his family estates “Camelot” to the love affair that the public had with the strikingly beautiful presidential couple, Jack and Jacqueline Kennedy.  That touch of magic extended to everything he did and virtually everybody in his family including his younger brother Robert who was idolized as well and almost certainly would have served as president had he not been tragically assassinated during his early bid for that office.

But this was not to say that Kennedy was not a phenomenal leader.  He faced serious challenges.  The Cuban Missile Crisis may have been one of the most frightening show downs between a nuclear Russia and a nuclear America that has ever happened in history.  When it became clear that Russia was beginning to build bases in Cuba and arm them with those terrible weapons, this was no time for a weak president.  Had Russia been able to bully Kennedy or intimidate the young president and put those missiles in Cuba, it seems certain that the outcome of the cold war would have been one of failure rather than success.  But Kennedy was not bullied or intimidated and using the power of his office, Kennedy stood his ground and stood ground for all Americans and forced the Russians to remove those missiles.  

But this was not the only great accomplishment of Kennedy’s administration.  It took a leader who had great vision and ability to inspire a nation as nobody else than John F. Kennedy could to set the sights of the nation on landing on the moon.  But Kennedy put that desire and that high calling in the hearts of his people and the nation rallied to finally see that man step out on the moon and declare, “This is one step for man, a giant leap for mankind.”  That was one of the proudest days in American history and it was Kennedy who inspired us to that kind of greatness.

As much as the life and leadership of John F. Kennedy perfectly exemplified the optimism and youthful zeal of a generation, his tragic assignation changed the country forever as well.  On that sad day of November 22, 1963 when Lee Harvey Oswald gunned down America’s beloved president, the hearts of Americans changed forever.

This was one of those days that almost everybody who was alive at the time, from school children to grandfathers remembered where they were when they heard the news.  Since we laid to rest this great leader, the presidency itself has never been the same.  While Americans will always respect their presidents, that sense of adoration for the man in the White House disappeared forever.  But the thing that did not disappear was the ongoing adoration of the man, John F. Kennedy, who inspired a generation and a nation to look forward to greatness and in the famous words of his inaugural address in 1961…

"Ask not what your country can do for you, ask what you can do for your country."

Manifest Destiny

Manifest Destiny

America is a vast country covering thousands of square miles of land that traverses tremendously diverse climate and landscape.  From high and majestic mountains, to wide deserts to vast fruitful plains that seem to go on forever, the sheer size of the physical landscape of America is breath taking.

Obviously, this was not always the case.  When those earliest settlers landed on the east coast and carved out their stark settlements, they had no idea of huge expanse of land that lay to the west.  It took the bold explorations of surveyors such and Lewis and Clark to report back how stunningly huge the amount of physical space that was available for America to inhabit.

At first, the very idea of becoming a nation was seemingly impossible for the early settlers to grasp.  They came here to escape persecution, tyranny or to make a new home for their families.  If they could have looked a few hundred years down the line into the future and seen the powerhouse of a nation that would grow up from their work in those early years, they would have been stunned that this country grew to be such a world force.  So the earliest challenges of settlers and early leaders of the citizens of the young America was to grasp the scope of what they were about to set about to achieve.

But grasp that scope they did.  It seemed that the physical majesty of what was to become the nation of America inspired a concept that was just as grand as the land itself and that was the concept of Manifest Destiny.  Manifest destiny was the force that drove those settlers and explorers to drive their wagon trains across sometimes impossible terrain through difficult weather conditions and facing many dangers from animals and Native Americans alike to build a nation that spanned form the Atlantic to the Pacific oceans.

This was the dream of the early settlers of this country.  They did not just see a new nation but one of importance, of an almost holy calling to become a virtual utopia of democracy and opportunity.  And part of that utopian vision was the idea of a nation that spanned ocean to ocean and from Mexico to the Canadian border as well.

When you think about it, its phenomenal that a people who did not have space photographs of a landscape or high speed travel such as is common today to get a vision of a unified nation of such vast size and scope.  But it was more than just physical size that spoke to the hearts and souls of those early Americans.  Manifest Destiny spoke to a vision of greatness for America that was birthed in the hearts of even these early citizens.

The size of the country was to be a reflection of the majesty of the human spirit and the magnificence of the American experiment to build a nation built on freedom, the will of the people and on democracy and opportunity.  Today such concepts seem ordinary and for that we can thank the early founders of this country for catching that dream together and making it a reality.

Many have criticized Manifest Destiny as greed or empire building.  And to be sure, mistakes were made and many people died or had their individual destinies hurt in the wholesale rush to the west that America experienced in its early decades.  But what is not diminished is that sense of calling and that sense that America was put here for something great.  That calling lives still in the hearts of all true Americans as we find out how we too can help our country fulfill its Manifest Destiny to be a voice for freedom and liberty in the world.  Let’s hope Americans never loose their sense of calling and destiny.  Because if that dies away, something holy and magnificent will die with it.

Remember the Alamo

America remembers many great battles that represent a turning point in a conflict that helped shaped our history.  We think of D-Day in World War II that turned the tide of victory toward the allies despite horrific losses.  But it is a unique battle that is remembered with pride and patriotism but is also a battle that was lost and almost everybody on our side brutally killed.  But that was the case in the battle for the Alamo in 1863.

The battle for the Alamo was not a conventional battle in the sense of two equally matched armies fighting back and forth to retain property.  It was, to put it bluntly, a slaughter.  But the brave stand of those few hundred Texans against thousands of Mexican soldiers continues to inspire us today because it was a stand against impossible odds but it was a stand that reflected the American ethic of never giving up or surrendering when there is a principle to be defended.

The siege at the Alamo actually lasted thirteen days.  It began on February 23, 1863 and it was over by March 6th.  It is hard to imagine today, with Mexico to our south a trusted ally of the United States but this was a battle to stop that attempts by Mexico to invade the newly forming country of the United States which was an act of war to be sure.  The brave men who stood against that vast army have become American icons of bravery and the American spirit and the names listed among those killed in that fort included Davy Crocket, Jim Bowie, the commander of the unit Lieutenant Colonel William B. Travis.  It was Travis that inspired his men to fight against insurmountable odds and his courage is what we celebrate whenever we say that famous rallying cry that come out of this battle which was “Remember the Alamo.”  Travis wrote in a letter how he defied the Mexican attackers on the eve of the final siege.

I am besieged, by a thousand or more of the Mexicans under Santa Anna.  I have sustained a continual Bombardment and cannonade for 24 hours and have not lost a man.  The enemy has demanded a surrender at discretion, otherwise, the garrison are to be put to the sword, if the fort is taken.  I have answered the demand with a cannon shot, and our flag still waves proudly from the walls.  I shall never surrender or retreat.  I am determined to sustain myself as long as possible and die like a soldier who never forgets what is due to his own honor & that of his country.  Victory or Death.

It was this brave stand that actually turned the war against this invading army to the advantage of the Americans.  The outrage from the slaughter of these men inspired that famous rallying cry that we remember even now centuries later when we hear those words “Remember the Alamo”.  Their stand against Santa Anna gave Sam Houston the time to organize a much more potent army which went on to deliver to Santa Anna a stunning defeat at San Jacinto which was the turning point for Texas which went on from there to victory in this war.

The spirit of Texas was never the same and to this day, Texas prides itself as a people of particular courage, boldness and a unique independence that even sets them apart from the already fiercely independent American spirit.  Moreover, the entire nation looks to this battle as an example of how a few good men helped deliver a victory, even if it was at the cost of their own lives.  That indeed is the true spirit of patriotism.

Asteroids

Asteroids

There is a lot of exciting stuff going on in the stars above us that make astronomy so much fun.  The truth is the universe is a constantly changing, moving, some would say “living” thing because you just never know what you are going to see on any given night of stargazing.

But of the many celestial phenomenons, there is probably none as exciting as that time you see your first asteroid on the move in the heavens.  To call asteroids the “rock stars” of astronomy is simultaneously a bad joke but an accurate depiction of how astronomy fans view them.  Unlike suns, planets and moons, asteroids are on the move, ever changing and, if they appear in the night sky, exciting and dynamic.

Like rock stars, asteroids have been given their fair share of urban myth and lore.  Many have attributed the extinction of the dinosaurs to the impact of a huge asteroid on the earth.  This theory has some credibility and, if it is true, it evokes some pretty startling images and foreboding fears in the current reining species on earth, the human race.

The fact that asteroids are fast moving space debris only makes their movement and activity more interesting and exciting.  Unlike a moon, planet or star, the odds that an asteroid could hit the earth are entirely reasonable and in fact, there are many documented cases of small asteroids making it through our atmosphere and leaving some pretty impressive craters in the earth’s surface.

Popular culture has happily embraced the idea of an asteroid impact.  The idea has spawned many a science fiction story adding the idea that alien life forms may ride asteroids to our world and start a “war of the worlds” situation.  But by far, the most talked about concept that has captured the imagination and the fears of science fiction fans and the general public is of another asteroid hitting the earth that could wipe out life as allegedly happened to the dinosaurs.  In fact, the movie “Armageddon” was based on this idea and the concept that somehow mankind could avert that catastrophe with technology.

But probably the best way to calm our fears and replace science fiction with science is with understanding and knowledge.  The truth is, there has been a lot of study of asteroid activity and the serious scientific community has gained significant knowledge of these amazing celestial bodies.  A number of probes to asteroids have been conducted which have given us a wealth of information about their composition and how we might predict their behavior.

We now know that the majority of asteroids we get to witness come from an asteroid belt that exists between Mars and Jupiter.  It is from this community of asteroids that many of the notable asteroids emerged.  Scientists have gained significant knowledge about the composition of asteroids and separated them into classes including class S which comes of the part of the belt that is closest to Mars, classes C, D and V which are classified by composition and a class called “Centaurs” whose flight patterns take them closer to Jupiter and Uranus.

Some of the probes NASA has conducted on near flying asteroids have performed some pretty amazing studies of these eccentric celestial bodies.  In 1994 the Galileo probe got within 1000 miles of the asteroid Ida and discovered that Ida actually had its own moon.

Other probes have fired impactors into asteroids and even landed on an asteroid to produce some amazing scientific data for us.  There is much to learn about asteroids in our love of astronomy and that knowledge only makes our enjoyment of seeing them in the cosmos even more exciting.

Astronomy Binoculars – A Great Alternative 

It seems from the moment you begin to take your love of astronomy seriously, the thing that is on your mind is what kind of telescope will you get.  And there is no question, investing in a good telescope can really enhance your enjoyment of your new passion in astronomy.  But don’t be too hasty to keep up with the big wigs in the astronomy clubs that have advanced telescopes.  There is another alternative that can give you most of the advantages of a telescope and some extra flexibility and reduced cost to boot. 

That alternative is a good pair of astronomy binoculars.  Mostly we think of binoculars as the thing you use to see the football game when you have to sit in the cheap seats.  But if you do some homework and had a good grasp on what your stargazing objectives are, the advantages of astronomy binoculars over an entry level telescope can be pretty convincing.

* As a rule, they are cheaper.  So you can get a lot of good stargazing at much less of an investment.  You can always spend more money later but for now, this may be just the solution for you.

* There are not so many accessories.  To own and operate a telescope takes a lot of orientation to how to set up and use the device.  Beyond that, tuning it for optimum view and diagnosing it when you have problems can sometimes make the telescope more of the passion than stargazing itself.

* It is much easier to use.  If you have not bought a telescope yet, you may have seen telescope owners going through a laborious set up and break down discipline for each use.  This is time they are not looking at the stars.  The binocular users are happily stargazing as this goes on.

* Binoculars are lightweight and portable.  Unless you have the luxury to set up and operate an observatory from your deck, you are probably going to travel to perform your viewings.  Binoculars go with you much easier and they are more lightweight to carry to the country and use while you are there than a cumbersome telescope set up kit.

So give the binocular option some consideration.  To make the most effective choice, however, here are a few facts about astronomy binoculars that will help you evaluate which ones are best for you…

Binoculars have two lens sets, one at the end of the eyepiece and a set right next to your eyes.  The ones closest to the eye are called the ocular lenses which magnify the image (make it bigger).  The ones closest to the sky are called the objective lenses and the size of these lenses will determine how much sky you can see at once.  So anytime you are evaluating binoculars, there are two numbers associated with the set.  So if the binoculars have a rating of 15-40, that means that the ocular lenses magnify 15 times and the later number is a relative number to how much of the sky you can see.  The higher the second number, the more you can see.  The explanation is simple.  The bigger the lens, the more light it lets in.  But be aware that the bigger the second number, the larger, heavier and more cumbersome the binoculars will be.

You will have to balance these two numbers with both your budget and what you want the binoculars to do for you.  If you decide to go with a lower power binoculars, you could become frustrated with what you can see and you may have to take your eyes away from the view to get your orientation and consult the star map more often because your range of vision is so limited.

There will also be a temptation to buy a set of binoculars that have zoom functions and other features that will allow you to use it for other purposes such as hunting, whale watching or seeing the football game from the cheap seats.  While this is good economy, those functions will get in the way when you are using the binoculars for astronomy.  So if you are considering this purchase as your alternative to buying a telescope, our advice is buy binoculars made just for astronomy and don’t take them to the ball game.  

Astronomy or Astrology?

Astronomy or Astrology?

Have you ever finally just gave in to the temptation and read your horoscope in the newspaper on Sunday morning?  Sure, we all have. For most of us, it’s a curiosity, an amusement to see what they say our day will be like based on the sign of the zodiac that we were born under.  Sometimes we forget that this little diversion is actually part of an ancient science called astrology that has had a powerful effect on many cultures dating back to centuries before Christ.

That is not to say that astrology is a dead art today.  It is easy to find astrology advocates in every town, advertising in the newspaper and on television trying to convince us that they can tell our fortune, our future and help cure our ills by exploring the mysteries of astrology.

When you are a lover of astronomy, the confusion between astronomy and astrology by those who don’t really understand the differences can get pretty aggravating.  And in early civilizations, the two disciplines were not separate.  Astrology was just the religious side of the science of astronomy.  So what changed?

The most significant shift that set in motion the separation of the two lines of thought began in the first century when Ptolemy wrote the very first book on astronomy called the Tetrabiblos.  In it, he began to suggest that astronomy should be considered a separate science from astrology.  It was quite a revolutionary book because it also was the first scientific document to suggest that the earth was not the center of the universe and that astronomy should be focused strictly on the observation and recording of events in the cosmos.

Over the next 2000 years, we have come a long way.  Not only has science and religion completely gone their separate ways since Ptolemy but the science of astronomy makes tremendous strides every year that are so phenomenal, Ptolemy would be truly astounded.

Probably the biggest point of diversion between a student of astrology and astronomy is the belief that the position of the stars has meaning over the events on our lives.  Of course, we do know that the weather and tides and other important aspects of our lives are affected by the stars, planets and heavenly bodies, particularly the moon.  But these things are happening because of completely explainable scientific laws in motion, not because of mystical forces at work.

What can we, as devotees of astronomy conclude about the close relationship between astrology and astronomy?  Well, for sure we want to be able to explain to anyone who is confused by the similarity in the words what the differences are.  We do not want to see the two approaches to the stars and planets to become confused again.  But we should do all we can do keep that distinction clear without becoming skeptical or demeaning towards those who may still hold to the teachings of astrology.

It is important to remember that what is part of a person’s religious life has a level of sacred belief to the one holding it.  And it is not respectful to scoff at such things.  If for no other reason than out of respect for the ancient origins of astronomy, we should give courtesy who still are exploring whether astrology has any validity for them.

If we can treat each discipline with respect but maintain the separation that must exist between astrology and astronomy, there is no reason both approaches to our admiration of the galaxies cannot coexist in peace and harmony.  And for our purposes as astronomers, that harmony will allow us plenty of freedom to enjoy our quest for knowledge for many more centuries to come.  And who knows, you might still like to read the horoscope on Sunday morning every so often.

Beyond the Naked Eye

It’s hard to say when in our lives each of us become aware of this thing called “astronomy”.  But it is safe to say that at some point on our lives, each and every one of us has that moment when we are suddenly stunned when we come face to face with the enormity of the universe that we see in the night sky.  For many of us who are city dwellers, we don’t really notice that sky up there on a routine basis.  The lights of the city do a good job of disguising the amazing display that is above all of our heads all of the time.

So it might be that once a year vacation to a camping spot or a trip to a relative’s house out in the country that we find ourselves outside when the spender of the night sky suddenly decides to put on it’s spectacular show.  If you have had that kind of moment when you were literally struck breathless by the spender the night sky can show to us, you can probably remember that exact moment when you could say little else but “wow” at what you saw.

That “Wow” moment is what astrology is all about.  For some, that wow moment becomes a passion that leads to a career studying the stars.  For a lucky few, that wow moment because an all consuming obsession that leads to them traveling to the stars in the space shuttle or on one of our early space missions.  But for most of us astrology may become a pastime or a regular hobby.  But we carry that wow moment with us for the rest of our lives and begin looking for ways to look deeper and learn more about the spectacular universe we see in the millions of stars above us each night.

To get started in learning how to observe the stars much better, there are some basic things we might need to look deeper, beyond just what we can see with the naked eye and begin to study the stars as well as enjoy them.  The first thing you need isn’t equipment at all but literature.  A good star map will show you the major constellations, the location of the key stars we use to navigate the sky and the planets that will appear larger than stars.  And if you add to that map some well done introductory materials into the hobby of astronomy, you are well on your way.

The next thing we naturally want to get is a good telescope.  You may have seen a hobbyist who is well along in their study setting up those really cool looking telescopes on a hill somewhere.  That excites the amateur astronomer in you because that must be the logical next step in the growth of your hobby.  But how to buy a good telescope can be downright confusing and intimidating.

Before you go to that big expense, it might be a better next step from the naked eye to invest in a good set of binoculars.  There are even binoculars that are suited for star gazing that will do just as good a job at giving you that extra vision you want to see just a little better the wonders of the universe.  A well designed set of binoculars also gives you much more mobility and ability to keep your “enhanced vision” at your fingertips when that amazing view just presents itself to you.

None of this precludes you from moving forward with your plans to put together an awesome telescope system.  Just be sure you get quality advice and training on how to configure your telescope to meet your needs.  Using these guidelines, you will enjoy hours of enjoyment stargazing at the phenomenal sights in the night sky that are beyond the naked eye.

Bonding with the Universe.

Bonding with the Universe.

As parents, we often worry about what our children are getting excited about.  We hope we can guide them to “bond” with healthy things like a love of learning, of family and of healthy social activities.  But we also worry they will bond with the wrong people like internet stalkers or the wrong crowd at school.  Wouldn’t it be great if we could harness that tremendous energy and desire to latch onto something and bond with it and help our children “bond” with the universe through a love of astronomy?

Kids love to get excited about what you are excited about.  So there lots of ways you can “spring” the fun of astronomy on them that will jump start them on a long and happy exploration of the hobby of astronomy.  Here are a few to get your imagination going.

* Work it into an evening in the backyard.  If you know the night sky will be particularly exciting the night of a big family barbecue, plan to have some blankets out there.  Then as everybody else is playing Frisbee, just lay out a blanket, lay flat on your back and start staring up into the sky with a binoculars.  Like the old prank of staring at a far away spot to get people’s interest, your kids will see what you are doing and what to know what is going on.  As you let them take a peek, their curiosity will take off like a wild fire and they are hooked.

* A surprise visit to the country.  Sometimes it is hard to see the vast display of stars from within the city.  So if you announce that you are going to show them a surprise one night and have them pile into the car, their curiosity will be going wild as you leave the city.  When you find that quiet park, field or lake side spot, all you have to do is point up and say “just look” and the magnificence of the night sky will do the rest.

* A special Christmas gift.  You can buy your children an affordable and durable beginner’s telescope along with some easy star maps written just for kids.  Imagine when they open this exciting gift and want to know how to use it.  Don’t be surprised if you are setting up the new telescope in the snow to show them the great things they will see in the cosmos with the gift that Santa wanted them to have.  The gift of astronomy.

* Unleash the power of a meteor shower on them.  You can keep your eye on the events that are predicted for the sky watchers in your area.  When the next big meteor shower is about to explode over your area, watch the weather for a clear night and get your kids excited about what they are about to see.  As the lights begin to go off over head and you create fun and interesting narration to this dramatic display, the children will be addicts for life for the great experiences that can be had as students of astronomy.

* Plan a surprise event in with something you are already doing.  For example, on vacation, you can plan your route on a cross country trip to bring you within visiting distance of one of the great multimillion dollar telescopes in this country.  By contacting them ahead of time, you can be sure they are conducting a tour that coincides with your visit.  Just imagine if they can look up at a telescope that is bigger than their house and maybe look through the eyepiece as some amazing cosmic sight, it will be the hit of the vacation.

Astronomy is a great activity to introduce on a family camping trip.  As the family sits around the fire after a fun night of camping, all you have to do is just look up and go “Wow, look at that!” When those little heads look up, they will look back down changed children, children in love with the stars.

Astronomy is a healthy passion for your kids and one they can grow with their entire lives.  And there is probably no better gift you can give them than the love of the stars, of science and of nature that is all wrapped up together when your kids bond with the universe through astronomy.

Comets - Visitors From Beyond.

The one thing we love the most in the world of astronomy is a good mystery.  And if there was ever a mysterious and yet very powerful force of nature that we witness in the night skies, it is the coming of the mighty comet.

The arrival of a comet within view of Earth is an event of international importance.  Witness the huge media attention that the Haley or Hale-Bopp have had when they have come within view The sight of these amazing space objects is simultaneously frightening and awe inspiring.

Above all, it is during these comet viewings that the astronomer comes out in all of us.  But what is a comet?  Where did it come from?  And how does it get that magnificent tail?

We should never confuse comets with asteroids.  Asteroids are small space rocks that come from an asteroid belt between Mars and Jupiter.  While still quite stunning to see, they pale in comparison to the arrival of a comet.  Asteroids also have received considerable study by the scientific community.

Not as much is known about comets.  As a rule, comets are considerably larger than asteroids.  The composition of a comet is a mixture of nebulous, gasses, ice, dust and space debris.  One scientist called the composition of a comet as similar to a “dirty snowball” because the composition is so diverse and changeable.  The center or nucleus of a comet is usually quiet solid but the “snowball” materials often create a “cloud” around that nucleus that can become quite large and that extends at great lengths behind the comet as it moves through space.  That trailing plume is what makes up the comet’s magnificent tail that makes it so exciting to watch when a comet comes within view of Earth.

The origins of comets is similarly mysterious.  There are a number of theories about where they come from but it is clear that they originate from outside our solar system, somewhere in deep space.  Some have speculated they are fragments left over from the organization of planets that get loose from whatever gravitational pull and are sent flying across space to eventually get caught up in the gravity of our sun bringing them into our solar system.

Another theory is that they come from a gaseous cloud called the Oort cloud which is cooling out there after the organization of the sun.  As this space debris cools, it gets organized into one body which then gathers sufficient mass to be attracted into the gravity of our solar system turning into a fast moving comet plummeting toward our sun.  However, because of the strong gravitational orbits of the many planets in our solar system, the comet does not always immediately collide with the sun and often takes on an orbit of its own.

The life expectancy of comets varies widely.  Scientists refer to a comet that is expected to burn out or impact the sun within two hundred years as a short period comet whereas a long period comet has a life expectancy of over two hundred years.  That may seem long to us as earth dwellers but in terms of stars and planets, this is a very short life as a space object indeed.

Scientists across the globe have put together some pretty impressive probes to learn more about comets to aid our understanding of these visitors from beyond.  In 1985, for example, the United States put a probe into the path of the comet Giacobini-Zinner which passed through the comets tail gathering tremendous scientific knowledge about comets.  Then in 1986, an international collation of scientists were able to launch a probe that was able to fly close to Haley’s comet as it passed near Earth and continue the research.

While science fiction writers and tabloid newspapers like to alarm us with the possibility of a comet impacting the earth, scientists who understand the orbits of comets and what changes their paths tell us this is unlikely.  That is good because some comets reach sizes that are as big as a planet so that impact would be devastating.  For now, we can enjoy the fun of seeing comets make their rare visits to our night sky and marvel at the spectacular shows that these visitors from beyond put on when they are visible in the cosmos.