states that about 13.7 billion years ago, the universe began with a huge fiery explosion

large group of stars, dust, and gas held together by gravity; can be elliptical, spiral,or irregular

final stage in the evolution of a very massive star, where the core's mass collapses to a point that it's gravity is so strong that not even light can escape

collapsed core of a supernova that shrink to about 20 km in diameter and contains only neutrons in the dense core

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science 7

the sun and universe

Term	Definition
Big Bang Theory	states that about 13.7 billion years ago, the universe began with a huge fiery explosion
galaxy	large group of stars, dust, and gas held together by gravity; can be elliptical, spiral,or irregular
black hole	final stage in the evolution of a very massive star, where the core's mass collapses to a point that it's gravity is so strong that not even light can escape
neutron star	collapsed core of a supernova that shrink to about 20 km in diameter and contains only neutrons in the dense core
nebula