Chapter 31.1 section 3&4 Flashcards
(12 cards)
Galaxy
A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
Milky way
A large group of Stars, dust, and gas.
Local group
A larger group of galaxies.
Cosmology
The study of how the universe began, how it continues to change, and what it is made of.
Big Bang Theory
An explanation for how the universe formed.
Cosmic Background Radiation
The residual microwave radiation emitted when the universe was very young.
Dark Matter
An invisible form of matter.
Dark Energy
An invisible form of energy.
Spiral, eliptical, and eregular
What are the three shape groups of galaxies?
Which galaxy is our solar system located in
Milky way galaxy
How many galaxies are in the local group
50
What are the two largest galaxies in the local group
Milky way galaxy and the andromeda
