Ch 31.3-31.4 Flashcards
1
Q
a large group of stars, dust, and gas held together by gravity
A
galaxy
2
Q
the sun is part of a larger group of stars, dust and gas
A
Milky Way
3
Q
a group of galaxies
A
Local Group
4
Q
the study of how the universe began, how it continues to change, and what it is made
A
cosmology
5
Q
how the universe was created
A
big bang theory
6
Q
the residual microwave emitted when the universe was very young
A
Cosmic background radiation
7
Q
an invisible form of matter that does not emit any detectable electromagnetic
A
Dark matter
8
Q
an invisible form of energy that creates a repulsive force causing the universe to expand at a faster rate
A
Dark energy
