The Universe (U2 review)

Front

Where are we located inside our galaxy?

Back

Spiral arm

Front

What is a black hole?

Back

A region of space that has a gravitational field so strong that no matter can escape.

Front

What is a nebula?

Back

Large clouds of gas & dust.

Front

How are galaxies classified?

Back

By shape.

Front

The theory that the Earth is at the center of the revolving planets is called the?

Back

Geocentric theory.

Front

What is the Milky Way?

Back

A barred spiral galaxy that contains our solar system.

Front

What is a supernova?

Back

An explosion of a star that occurs at the end of its life cycle.

Front

What is the Big Bang Theory?

Back

The leading explanation for the origin of the universe, stating it began from a singularity.

Front

What is dark matter?

Back

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

Front

What is a star?

Back

A massive, luminous sphere of plasma held together by gravity.