Stars, Galaxies and the Universe - 2

Front

What is a supernova?

Back

A star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

Front

What determines a star's life cycle path?

Back

Mass.

Front

What type of galaxy is round in shape and contains very little gas or dust?

Back

Elliptical.

Front

What type of galaxy has arms that spiral outwards?

Back

Spiral.

Front

What is the collection of stars, dust, and gas held together by gravity called?

Back

Galaxy.

Front

What is the term for an object with gravity so strong that no light can escape?

Back

Black hole.

Front

What is the main component of stars?

Back

Hydrogen.

Front

What is the process called when a star uses hydrogen to create helium?

Back

Nuclear fusion.

Front

What is the name of our galaxy?

Back

The Milky Way.

Front

What type of galaxy has an irregular shape and does not fit into other categories?

Back

Irregular galaxy.