Hamlet's 'brave, o'erhanging firmament' has always held a certain wide-eyed fascination. As a jobbing physicist who has taught astrophysics as examination fodder, I know what a Cepheid variable is. I know about apparent and absolute magnitude. The fate of the Sun as it expands into a Red Giant - not a problem. As to being asked, off the cuff, where Betelgeuse is tonight, no clue. Not one.
|Celestron Skymaster 25x70 binoculars|
Turns out, astronomers were Internet junkies almost from its inception. There's quite a body of astronomical knowledge out there and a very long observational history since people have been gazing heavenward in awe and wonder pretty much since we left off fraternising with the Neanderthals and struck out on our own. Ptolemy of Alexandria lived 1900 years ago and his geocentric model of the Universe remained virtually unchallenged until Copernicus. My hero, for quite a number of reasons was the guy we always address by his first name, Galileo. Apart from standing up to the Pope - stout fellow for that - he was an observer of the heavens, which I am trying in some small way to become. Heeding the advice of seasoned astronomers, therefore, I have equipped myself with a decent pair of bins rather than a full-fledged Schmidt-Cassegrain telescope, since I'd like to get a bit of practice finding stuff before I waste a ton of money on the optics. A camera tripod completes the setup, for now, since holding a pair of 25x70's still is a near-impossibility.
Tonight, I'm hoping the clouds roll away to reveal Jupiter who will be in “full moon” phase when it ( or is it 'he')reaches closest opposition tonight, a mere eight hundred and fifty million kilometres away, rising east-north-east and remaining visible all night until setting around sunrise, exactly like a full moon. As I write, he's there, peeping shyly out from behind the neighbours' winter trees with moons trailing behind in a line, like the tail of a kite.
Just at sunset, facing the other way, Venus is bright in the southwestern sky, fading Mars a little higher and more to the west. Perhaps I'll catch a glimpse as she settles down behind the tree-line.
|Winter moon with Jupiter, 2008 (naked eye)|
The ancients believed that the firmament was a blanket covering the Earth at night. Imperfections in the blanket produced starlight, where the light of Heaven shone through.
Stargazing has a habit of bringing one down to size - the vastness of space, extending almost fourteen billion light years is, in some small way, comprehensible by a life form made of twisted nucleic acid and protein with the capacity to wonder at it.