Space Vocabulary

2. Fusion, process where two atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy
5. The curve path an object moves as it circles around another object.
7. A large cloud of dust and gas in space. New stars can be born here.
9. an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
10. Diagram, Hertz sprung-Russell diagram, a graph that shows the relationship temperature and brightness of a star. Used to classify a star.
13. An elongated circle, or oval shape, the shape of the planet's orbit.

1. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
3. An attractive force existing between any two objects with a mass
4. A natural object that moves around a larger object like a planet or asteroid
6. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
7. Fission, the process where the nucleus of an atom splits into two or more smaller nuclei, releasing a substantial amount of energy
8. A ball of shining gas, made mostly of hydrogen and helium, held together by its own gravity.
11. Shift, shift of light to a longer wavelength as its source moves away from the observer.
12. Bang Theory, The theory that most scientists use to describe the origin of the Universe.