Review for FLASHCARD - Tools of Astr, Universe, & Galaxies 2024

Front

What is an irregular galaxy?

Back

An irregular galaxy is a type of galaxy that does not have a distinct regular shape, unlike spiral or elliptical galaxies. They often contain a mix of stars, gas, and dust.

Front

Why are unmanned space probes used to explore outer space?

Back

Unmanned space probes are used because it is too dangerous for humans to travel to certain areas of space.

Front

What is located at the center of our galaxy?

Back

At the center of our galaxy, there is a very large black hole.

Front

How would you describe a galaxy?

Back

A galaxy is a system of billions of stars, gas, and dust held together by gravity.

Front

What is a light year?

Back

A light year is the distance that light travels in one year, approximately 9.46 trillion kilometers.

Front

What are the main components of a galaxy?

Back

The main components of a galaxy include stars, gas, dust, and dark matter.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system, characterized by its spiral shape.

Front

What is a black hole?

Back

A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is the difference between a spiral galaxy and an elliptical galaxy?

Back

A spiral galaxy has a flat, rotating disk with arms that spiral outward, while an elliptical galaxy is more rounded and lacks the distinct structure of spiral arms.

Front

What is dark matter?

Back

Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.