Yes, I have seen this one

In 1986, one could look to the sky and see a beautiful, bright star with a tail as long as from the Earth to the moon.  It would not be the first time that celestial body would have been seen by humans.  There are tales of this "star" showing up on a regular basis since 240 BCE.  Other and older reports also exist, but it is unknown whether or not they pertain to this beautiful, bright, long-tailed star.

It was the good fortune of Isaac Newton's friend, not Newton himself, who calculated the periodic return of this fiery but majestic celestial body every 76 years.  Edmond Halley gets the credit for predicting this comet after years of scientific study of its phenomenon.

A person is lucky to see it once in her/his lifetime.  When the average mortality age was 65, one would just have to be born strategically to view the comet's appearance.  Now, with an average mortality age of 80, one has the chance to see it twice.  Still, though, that's a very small class of people.  Once is what most people will see this splendid comet.  Human lives are short, no doubt.  And many people do not see this comet at all in their lifetimes. 

It is my experience that people meet just the right person, their Halley's Comet, once in a lifetime.  Some get that lucky chance early in life, some later.  But, a person always knows when (s)he has met the one.  His/her lips cannot stop smiling.  The joy of living is unmistakable.  The buoyancy of meeting the routines and other mundane matters in life with zest cause life to suddenly be an adventure worth living out.  Having someone to believe in and be believed by is the rare, once-in-a-lifetime pass-by of someone beautiful, bright, and full of vibrance and inspiration.  And, yes, I have seen the one celestial, beautiful, bright Halley's Comet!