Wednesday, August 24, 2011

lightspeed and galaxies

Time travel
again a new experience

Looking at NASA space pictures, like the ones from the Hubble can be humiliating.

My desktop display has a few at this time, and one has a few billion galaxies dotted around in it.
Not a few, billyans!

When you think about it,  Andromeda Galaxy, the closest galaxy to The Milky Way, is only two million light years away, and it is calculated by some people both are to collide at some time down the track well after we are history. Lightyear- how far does a photon travels in one year Marvin? About ten Trillion kilometers... Oh.
The one measurement New York bankers might prick the ears up at... gotta be a percentage in that somehow !

I hated thinking of/about infinity when I was very young. Like also thinking that [a] God has you, and you, and you as well as me on his mind 24/7 and is all around us and knows what is going  to happen etc etc - both ideas are plain creepy and scary. Then and now.

Recent reports are of some starlight that is {another} calculated to be as old as the universe! That calculation is supposed to be close to 12 or 14 billion years old. What's a few billyan tween friends?

But really, it's colossal.

Driving a car to the moon, [yeah, try it Bill Gates] is a bit of a trip too. The average Earth-Moon distance is about 385,000 km, so allowing for drink and bathroom stops every two or three hours, a sleepover some where, it would take thGriswold Family about [tap tap click tap lose page, get it back] about forever. Even, say, at 60mph without a stop could take more than a few months...

Back to the galaxy thing, and time travel. Swiveling your eyes over the picture the galaxies don't look far apart, but it has to be several millions of lightyears between them.

Even looking around the night sky, there is all those photons coming at ya from a long long time ago. And if there are Others on Another Planet around the Milky Way a bit, and they can see the same thing as we do, that is a LOT of photons being spread around since time started.

Maybe that is what dark matter really is, all those freaking photons....

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