Match the following. Match the items in the left column to the items in the right column. 1. cosmological principle
2. cosmology
3. galaxy
4. big bang theory
the study of the origin and structure
of the universe
the universe looks the same at any
location, but can change over time
suggests the origin of the universe
started with an explosion and expansion
of a very hot, dense, compact fireball
theory about the origin of the
universe that suggests the universe has
been and will continue to be as it is now
the oldest and farthest celestial
bodies of the universe
a large-scale collection of stars,
dust, and gas held together by gravity
theory about the origin of the
universe that suggests the universe is a
never-ending cycle of expansion and
contraction
5. oscillating universe theory
6. quasars
7. steady state theory