The Universe

What are the 3 possibilities that could happen to our universe?

1) The universe will expand forever 2) The expansion of the universe will gradually slow down and the universe will stay the same. 3)The Universe will stop expanding and start to fall apart.

How many minutes does it take for the sun's light to reach earth?

8 minutes.

Galaxy

A collection of stars, dust and gas bound together by gravity

Cluster

A group of stars or galaxies bound by gravity

Meteors

Asteroids that entered Earth's atmosphere

The Universe is expanding and the expansion is getting __________

Bigger

Galaxies can also form from what?

Collisions

What is the Universe made out of?

Empty Space.

The Universe is always ______

Expanding

What will happen if there's too much mass?

Gravity will eventually overcome expansion and the universe will contract

What elements were formed from the Big Bang?

Helium and Hydrogen.

Comets

Icy Leftovers (Chunks)

Which Element do all stars form up to?

Iron (Fe-#26)

What is Fusion?

It's something that creates energy and stars. It produces heat and light and is the reason why we can see Stars.

Our Fate of the universe depends on what?

Mass.

What is Dark Matter?

Matter that we can't see.

What form did the Big Bang form in?

Microwave Radiation.

What can Dark Matter be?

Planets Black holes Brown Dwarfs

What is Cosmic Background?

Radiation that supports The Big Bang Theory

Asteriods

Rocky Leftovers (Chunks)

What theory states that all the matter in the universe expanded rapidly outward like a gigantic explosion?

The Big Bang.

What are 3 types of Galaxies?

Spiral Elliptical Irregular

What are Brown Dwarfs?

Stars (Or starlike objects) that lack enough mass to begin fusion.

Once Hydrogen atoms formed what also began to form too?

Stars and Galaxies

What is it that many Scientists believe?

That microwaves and dim remains of radiation were produced during The Big Bang

What does Expansion Imply?

That the Universe was once smaller.

What is proof that the Universe is expanding?

The Redshift

Universe

The Sum of all space, matter, and energy that exist, and that have existed in the past and that will exist in the future.

What will happen if there's not enough mass?

The gravitational pull will be too small to stop the expansion.

Galaxies change as they use up what?

Their Gas and Dust

Galaxies change over ________

Time

Does it take time for the light to travel to Earth?

Yes.