CH 31.3-31.4 Flashcards
1
Q
galaxy
A
a group of billions of stars with dust and gas grouped
2
Q
milky way
A
the galaxy we live in
3
Q
local group
A
the galaxy cluster that contains the milky way
4
Q
cosmology
A
the study of the universe
5
Q
BBT
A
the theory that states how the universe was made
6
Q
CBR
A
radiation that dates back to the beginning of the universe
7
Q
dark matter
A
matter that accounts for 82% of the universe
8
Q
dark energy
A
the energy that is responsible for the rapid expansion of the universe
9
Q
how many galaxies are in the local group
A
about 50
10
Q
what are the two largest galaxies in the local group
A
milky way, Andromeda
