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THE CHATTER BOX

 
  
  
  The Chatter Box : Blathering On
  
  
  
 
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Astronomy Picture of the Day by ev on 29 July 2007 11:53pm
 
Here's a website from NASA called 'Astronomy Picture of the Day'. Each day a new photo of some part of 'our' amazing universe:

http://antwrp.gsfc.nasa.gov/apod/lib/aptree.html
 
Re: Astronomy Picture of the Day by ev on 30 July 2007 12:00am
 
So when we look up at the night sky, at the Milky Way ('our' galaxy of 100+ billion stars), this is what is actually there but we just can't see it all. In the centre of picture you can see the centre of our galaxy, largely obscured by huge clouds of dust. With this amazing photo you can get a bit of an idea of our Solar System's ('ol Sunnyboy et al.) position in the Milky Way galaxy.

Truly incredible:

http://antwrp.gsfc.nasa.gov/apod/ap051004.html
 
Re: Astronomy Picture of the Day by ev on 30 July 2007 12:03am
 
Note: The reason you can't see all of this at night is because the Earth's atmosphere stops all the light getting through. Also light pollution (can't see many stars from the middle of big cities like London, New York or Sydney)..
 
Re: Astronomy Picture of the Day by ev on 30 July 2007 12:09am
 
And of course, one feels obliged to post a link to Monty Python's 'Galaxy Song' from 'The Meaning of Life' :)

http://www.youtube.com/watch?v=PYmeSBUPswM
 
Re: Astronomy Picture of the Day by kazzzz on 30 July 2007 2:36am
 
Ooh this is a great link ev, thanx for that :)
 
Re: Astronomy Picture of the Day by johnnythemonkey on 30 July 2007 2:43am
 
The Python song is 'ace', dunno much about the astronomy stuff earlier though Ev. Did you feel as if you were talking to yourself when you made 4 straight posts ? :)
 
Re: Astronomy Picture of the Day by ev on 30 July 2007 3:13am
 
Nah, they were just rapid after-thoughts.. and also if I try to edit the posts then I usually get an echo..
 
Re: Astronomy Picture of the Day by johnnythemonkey on 30 July 2007 3:16am
 
At least an echo is a response Ev. Good thread anyway; you know how things diversify here though ! And I'm guiltier than most !
 
Re: Astronomy Picture of the Day by ev on 30 July 2007 3:30am
 
The astronomy stuff goes something like this:

We go round and round 'ol Sunnyboy. So do the other planets (Venus, Mars, Jupiter, Saturn, etc.). This is called our Solar System.

At the same, the whole lot, including our sun, go round and round in the Milky Way galaxy. The 'Milky Way' is simply what we can see (from earth) of our own galaxy. Our spiral-shaped galaxy has more than 100 billion stars (like our Sun, though all different sizes) all spinning around the centre. In the middle is a supermassive blackhole (at least most astronomers believe so).

Now, our Milky Way galaxy is just one out of something like 140+ billion galaxies of all shapes and sizes in the universe, and that's only the ones they've been able to count SO FAR with our current telescopes! Most of these galaxies are millions of light years away from each other, although they do collide, merge, warp and destroy each other from time to time.

Simple, ain't it.

Oh, and even if we wanted to send a spaceship to the closest star to check it out, even going at 250,000km/hr it would still take 18,000 years.

However, if we work out how to travel at the speed of light, it will only take 4.35 years to get there. The speed of light however is 1,079,252,848.8 km/h.
 
Re: Astronomy Picture of the Day by johnnythemonkey on 30 July 2007 3:41am
 
'We go round and round 'ol Sunnyboy.'

You might and the rest of you might. I prefer to do my own thing. Bit of a loner really.
 
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