Stars and Astronomers Timeline

3. Collected data on thousands of stars and the planets. Had a golden nose.
7. Explained how gravity worked.
10. A star that keeps fusing elements up to iron.
11. An star that has NOT started fusion, but is heating up and being gathered by gravity.
13. Combining elements inside a star to create new elements and create energy.
15. The explosion of a massive star when its layers collapse.
16. A cloud of hydrogen gas and dust in space.
17. Wrote 3 laws on how planets move.
18. The pulling force that attracts all objects in the Universe.
19. First person to use a telescope for studying space.
20. The study of the universe and everything in it.
21. When a white dwarf star shines and lights up the leftover layers from a red giant star.

1. Discovered that other galaxies exist.
2. An object so dense that not even light can escape its gravity.
4. The idea that the Sun is the center of the Universe.
5. The elements of chemicals that make up something.
6. A star that has run out of helium, has expanded, and now fuses helium.
8. A crushed core of a small star that is made of carbon and electrons.
9. The first person to claim the Sun was the center of everything.
12. The incorrect idea that the Earth is the center of the Universe.
14. Adult stars that are converting hydrogen into helium through the process of fusion.
16. A crushed core of a massive star that is made of mostly neutrons.