space crossword

4. Giant, forms after a star has run out of hydrogen fuel for nuclear fusion, and has begun the process of dying
5. A giant cloud of dust and gas in space
8. A place in space where gravity pulls so much that even light cannot get out.
11. after a massive star has run out of fuel, turned into a red supergiant and exploded
13. A collection of billions of stars held together in space by their own gravity
14. the gravitationally collapsed core of a massive supergiant star
15. Dwarf, When all the nuclear reactions are over, a small star like the Sun may begin to contract under the pull of gravity

1. Theory about the development of the Universe, beginning from a single point of high density.
2. Small nuclei can react to release energy in a process called nuclear fusion. Nuclear fusion is defined as: When two light nuclei join to form a heavier nucleus
3. The first stage all stars go through after forming from a nebula.
6. Calculated by ѵ = 2πr/T
7. The distance travelled by light in one year in the vacuum of space
9. A large object that orbits a star.
10. Way, One of many billions of galaxies making up the Universe; in which our Sun belongs to
12. One complete circuit around a celestial body.