Stars and Galaxies

Front

What is an irregular galaxy?

Back

An irregular galaxy is a type of galaxy that does not have a distinct regular shape or form.

Front

What is the role of an astronomer?

Back

An astronomer is a scientist who studies celestial objects, space, and the universe as a whole.

Front

What is a dwarf star?

Back

A dwarf star is a small star that is no bigger than Earth.

Front

What does apparent brightness mean?

Back

Apparent brightness refers to how bright a star appears to observers on Earth.

Front

What is a supergiant star?

Back

A supergiant star is a very large star that is much bigger than the Sun.

Front

What are the main types of galaxies?

Back

The main types of galaxies are spiral, elliptical, and irregular.

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 elliptical galaxy?

Back

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

Front

What is the difference between true brightness and apparent brightness?

Back

True brightness is the actual luminosity of a star, while apparent brightness is how bright it looks from Earth.

Front

What is a red giant?

Back

A red giant is a large star that has expanded and cooled, giving it a reddish appearance.