Flashcards in Lecture 2 Deck (5)
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1
Q
what is the observable universe—
A
the information/light that reaches us
2
Q
how much can we see
A
we can only see about 14 billion years away, doesn’t mean it is only 14 billion light years long
3
Q
why is the very, very large and the very, very large is difficult for use to understand
A
because we can only really naturally comprehend what we experience/see/do
4
Q
what has happened as technology has matured and slowed us to probe these new scales
A
we have had to modify our physical theories
5
Q
what can we conclude about earth
A
life on earth has generally evolved in middle-of-the-road conditions (exception is speed in which we are SLOW)