Earth Space - The Universe Review

Front

What percentage of matter in the universe is luminous?

Back

4%

Front

What do we call the theory that states that the universe will one day collapse back in on itself?

Back

Closed universe

Front

How many galaxies are there in the universe?

Back

100 billion

Front

What is cosmic background radiation?

Back

Leftover static from the Big Bang

Front

What shape galaxy is this? (Barred Spiral)

Back

Barred spiral

Front

What is the Big Bang Theory?

Back

The leading explanation about how the universe began.

Front

What is dark matter?

Back

A type of matter that does not emit light or energy, making it invisible.

Front

What is a black hole?

Back

A region in space where the gravitational pull is so strong that nothing can escape from it.

Front

What is the observable universe?

Back

The part of the universe that we can see and measure.

Front

What is a supernova?

Back

A powerful explosion that occurs at the end of a star's life cycle.