Posted By crates on August 31, 2009

    I was recently watching this TV program on black holes.  As usual when I contemplate such things, I became slightly depressed.

    When a star which is about three times or more the mass of our sun reaches the end of its life, it collapses and in the process blows out a great mass of matter and energy creating a supernova.  What is left behind is so incredibly dense that the gravitational field that it creates traps even light itself from escaping—the black hole.

     Black holes come in many sizes.  Sometimes they coalesce, creating even larger black holes.  The evidence is pretty conclusive that the center of most galaxies is occupied by massive black holes.

    The program showed computer simulations of galactic collisons and close encounters that spanned eons (see here for some simulations).  The billions of stars in each galaxy in these simulations resembled dust motes that swirled and rotated about each other creating fantastic shapes before settling down to some sort of stable configuration.  Here is one interesting quote concerning the movement of galaxies:

It is speculated that a feeding frenzy occurs when large galaxies collide resulting in even more massive black holes.   It is believed that hundreds of thousands of smaller stellar black holes swarm about the massive galactic black hole subjecting the nearby star systems to a destruction derby which causes some stars to leave the galaxy entirely or causes it to fall into the massive center.

     Although our own Milky Way Galaxy has probably not consumed any large galaxies (smaller ones, yes :burp:), in about two billion years, Andromeda, our nearest large galaxy, and ours will begin to collide.  The massive black holes of each galaxy will coalesce to form one large super black hole that will consume incredible amounts of matter, igniting a new quasar.

   Now the thought of all this is totally fascinating in some respects.  The idea of billions of galaxies  inexorably following the laws of physics…matter and energy interacting in such spectacular ways fascinates and enthralls one’s imagination.

   But then my imagination swerves off on a tangent.  I think of the crowded galactic center, probably having large numbers of older stars than what is found out near the rim.  Many of these older solar systems very likely have life forms on their planets.  A certain small percentage, amounting to thousands when we consider these large numbers, very possibly supports intelligent life forms.

    I think of these intelligent beings contemplating their fate, watching their own star system begin it’s inexorable slide toward the maw of the great ravening beast at the galactic center.  I think of the panic, the frantic plans to save the race, possibly sending out colony ships.  I think of those left behind perhaps having the time to develop a philosophy of resignation to prepare themselves for the inevitible end. 

    I think of this happening thousands of times over the millions and billions of years that is involved in the process.   I think of these civilizations, unique in their outlook and philosophies…lost forever.

     And if this isn’t bad enough, I think of the implications.  I think of sentient beings living on  infitesimal motes of dust, coming into being, surviving and ultimately wending their way to extinction in a blind, uncaring universe of interacting energy and matter.

      Sometimes this is disturbing when I ponder upon it.  

     Then I begin to think of the relative nature of it all.  The life of man compared to the 14 billion year age of our universe, the almost four billion years that have passed since the origins of life on earth, the gradual evolution of life eventually resulting in me pondering such things.  

     And then moments like this morning as I walked through fog and mist, my face upturned, feeling the cool droplets on my face, listening to the foghorns and the sound of small birds in the forest through which I passed. 

     Perhaps we create our own caring, our own warm little niche in this universal howling wilderness.

    Thank the good Lord for  small things, I think…to heck with the long view.

Categories: Evolution, Extinction
Tags: black holes, galactic collisions, super nova