The Universe

Front

What is the most abundant matter in the universe?

Back

Hydrogen, helium, and dark matter.

Front

How can we observe black holes?

Back

We see the light of the stars at its event horizon; they reflect off of objects around the accretion disk.

Front

What is theorized to speed up the expansion of the universe?

Back

Dark energy.

Front

What is theorized to slow down the expansion of the universe?

Back

Dark matter.

Front

What classification does the galaxy SBb belong to?

Back

It is a barred spiral galaxy.

Front

What is dark energy?

Back

A force that speeds up the expansion of the universe.

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 the event horizon of a black hole?

Back

The boundary beyond which nothing can escape the gravitational pull of the black hole.

Front

What is a supernova?

Back

A powerful and luminous explosion of a star, marking the end of its life cycle.

Front

What is the difference between dark energy and dark matter?

Back

Dark energy accelerates the expansion of the universe, while dark matter contributes to the gravitational pull that holds galaxies together.