Universe

Who came up with the theory that the universe is open, closed, or flat?

Albert Einstein

How often is the universe is expanding?

All the time

What percent of the universe is dark matter?

27%

Around what percent of the universe is dark energy?

68%

Why is dark matter called dark matter?

Because it cannot be seen with any type of instrument we have today.

However, what is most of the universe made of?

Dark matter and dark energy.

How fast do scientists think the edge of the universe is expanding?

Faster than the speed of light.

What do scientists call the part of the universe they can see?

Observable universe

What does the theory of dark energy help scientists explain?

It helps scientist explain why the universe is expanding.

How big is the universe?

No one knows how big the universe is, but scientists measure what they can see. And by what they can see the universe is 93 billion light years across.

Is there a center to the universe?

No.

What percent of the universe do all the atoms make up?

Only four percent

How many galaxies are in the universe?

Over 170 billion galaxies

How old is the universe?

Scientist believe that the universe is between 13 and 14 billion years old.

What shape do scientists believe the universe is?

Scientist believe the universe is flat.

What is dark matter?

Scientist don't quite know what it is but they think it exists due to experiments.

What is dark energy?

Something scientist believes fills all space.

What part of the universe is expanding at a faster and faster rate?

The edge of the universe

What does the Universe contain?

The universe contains everything that exists including the Earth, planets, stars, space and galaxies. This includes all matter, energy, and even time.

If the universe continues to cool, what may happen?

The universe may freeze.

What are large empty spaces in the universe called?

Voids.

How did the universe begin?

With a massive explosion called the Big Bang.

Is the universe expanding?

Yes

What is the universe?

all existing matter and space considered as a whole

What is the universe made of?

galaxies

What are the two most abundant elements of the universe?

hydrogen and helium.