31.3 and .4 Flashcards
(17 cards)
a large group of stars, dust, and gas held together by gravity
galexy
the group of stars we live in
the milky way
local group
the group of galexies we are in
the study of the universe
cosmology
theory in which the universe all began at once
big bang theory
residual microwave radiation
cosmic background radiation
invisible form of matter
dark matter
invisible form of energy
dark energy
what are the 3 shapes a galexy can be
spiral, elliptical, irregular
what shape is the milky way galexy
spiral
how many galexies are in the local group
50
what is the local group
the group of galexies that are closest to us
what are the 2 largest galexies in the local group
milky way and andromeda
where are we in the milky way
in the center of one of the arms
how long ago did the big bang happen
13.7 billion years ago
what is the effect that shows a change in light wave lenghts
dopler effect
what is the universe made of
regular matter, dark matter
