THE UNIVERSE

Front

What is luminosity in relation to stars?

Back

Luminosity refers to the brightness of a star.

Front

What are the major types of galaxies?

Back

The major types of galaxies include spiral galaxies, irregular galaxies, and elliptical galaxies.

Front

What best describes a star?

Back

A star is a celestial body made up of gas that gives off light.

Front

What are absolute magnitude and luminosity?

Back

Absolute magnitude is a measure of the intrinsic brightness of a star, while luminosity is the total amount of energy emitted by a star per second.

Front

What are voids in the universe?

Back

Voids are the parts of the universe that are located between galaxies.

Front

What is a spiral galaxy?

Back

A spiral galaxy is a type of galaxy characterized by its spiral arms and a central bulge.

Front

What is an irregular galaxy?

Back

An irregular galaxy is a galaxy that does not have a distinct regular shape, often appearing chaotic.

Front

What is an elliptical galaxy?

Back

An elliptical galaxy is a type of galaxy that has an ellipsoidal shape and lacks the distinct features of spiral galaxies.

Front

What is apparent magnitude?

Back

Apparent magnitude is a measure of how bright a star appears from Earth.

Front

What is the difference between absolute magnitude and apparent magnitude?

Back

Absolute magnitude measures a star's intrinsic brightness, while apparent magnitude measures how bright it appears from Earth.