cosmology & life Flashcards
1
Q
Vr = H0 * Dg
A
Vr=velocity, H0=22, Dg=distance
2
Q
hubble time
A
13.6 billion years ago when separation was 0
3
Q
Ωm = 1
A
density will be at the critical density
4
Q
Ωm > 1
A
expansion will stop and the universe will contract (big crunch)
5
Q
Ωm < 1
A
expansion will go on forever
6
Q
dark energy decreases
A
big crunch
7
Q
dark energy effect increases
A
big rip
8
Q
constant dark energy
A
big chill
9
Q
drake equation multiply:
A
number of stars in our galaxy, fraction of stars with planets, averge number of planets per star, fraction of planets with life, fraction that develop
10
Q
what is the drake equation used for
A
finding extraterrestrial life
