Time line of the Universe

http://hendrix2.uoregon.edu/~imamura/123/lecture-1/The%20Known%20Universe.flv

Size scales of the Universe

Comment: We use two different length scales in astronomy when dealing with cosmology. The scales are the light year, the distance a beam of light travels in 1 year or

1 light year = 9.5 trillion kilometers ~ 5.9 trillion miles.

The other length scale used is the parallax second or more commonly the parsec which is

1 parsec = 3.08×1013 kilometers ~ 3.24 light years

Sent iPadn Ť€©ћ№©¶@τ

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: