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The univserse list 2
| Term | Definition |
|---|---|
| The Milky Way | The galaxy that our star system is a part of |
| Nebula | A collection of gas, rock and dust floating in space. Many are larger than star systems. |
| The Big Bang Theory | 14 billion years ago (1.4 x 10^10) scientists believe all matter in the universe was in a infinitely dense spot. Something caused the matter and energy to expand, creating the universe. |
| Stars | Stars: immense spheres of gas and plasma. Produce light from Nuclear Fusion |
| Parallax | Scientists get two views of space by the Earth’s revolution around the sun. |
| Astronomy | the study of space. Also known as astrophysics |
| Astronomical Unit (AU) | the distance between Earth and the Sun. |
| Light Year ( ly) | a unit of distance. The distance light travels in one year. 9,500,000,000,000 km per year |
| Parsec | Unit of distance=3.26 light years |
| Alpha Centauri | The nearest star to our Sun. |