Lecture 2 Flashcards Preview

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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)