Unit 7 Vocab flashcard - Space

Front

Theory in astronomy stating the universe began in an explosion from a single point of infinite energy density.

Back

Big Bang Theory

Front

Object in space with gravity so strong that light/matter can't escape.

Back

Black Hole

Front

Huge collections of stars in space.

Back

Galaxy

Front

A contracting gas mass in early star formation, before nuclear fusion.

Back

Proto star

Front

Wide, outermost layer of a star’s atmosphere.

Back

Corona

Front

Avg. distance Earth-Sun: 150M km.

Back

Astronomical Unit

Front

Dense, compact star formed after a supernova, mainly made of neutrons.

Back

Neutron Star

Front

Process where nuclei of atoms combine into a larger nucleus, releasing vast energy as light and heat.

Back

Nuclear Fusion

Front

True brightness of an object.

Back

Luminosity

Front

Diagram to chart stars by brightness and size.

Back

Hertzsprung-Russell Diagram