Big Bang Theory, Galaxies, & Gravity
Galaxy
A collection of stars, dust, and gas held together by gravity
Gravity
A force that pulls objects toward each other
How does mass effect gravity?
The bigger the mass, the stronger the gravity. The smaller the mass, the weaker the gravity.
How does distance affect gravity?
The greater the distance between objects, the weaker the gravity. The lesser the distance between objects, the stronger the gravity.
What effect does Earth's Gravity have on the Moon?
The moon stays in orbit around Earth due to Earth's Gravity.
Milky Way Galaxy
The name of the galaxy that contains OUR Solar System.
Step #2 of the Big Bang Theory
The step of the Big Bang Theory when a violent event occurred, creating matter and causing the universe to expand outwards into space.
Step #1 of the Big Bang Theory (Pre-Big Bang)
The step of the Big Bang Theory when all of the energy of the universe is contained in one small, hot, dense point.
Step #4 of the Big Bang Theory
The step of the Big Bang Theory when gravity of more massive objects begin pulling smaller objects forming galaxies.
Step #3 of the Big Bang Theory
The step of the Big Bang Theory when particles of matter begin to cool and clump together due to gravity, creating stars and planets.
Big Bang Theory
The theory that the universe originated in a huge explosion that released all matter and energy.
How did Galaxies form?
Throughout the life of the Universe, huge pockets of gas have been pulled together by gravitational forces to form stars. In turn, these stars have been drawn together by GRAVITY to form families of billions of stars, called galaxies.
Two Factors that Effect Gravity
mass and distance