Ast 1013

2. the study of the structure and evolution of the universe.
5. Spiral Galaxy: A type of galaxy that has a bar of stars across the bulge.
8. Component, A part of spiral galaxy that has stars of all ages and many gas clouds
9. mass ejections: send bursts of energetic charged particles out through the solar system.
10. lensing: the bending of light rays by gravity, can also tell us a cluster’ s mass
12. Galaxy: A type of galaxy that has all spheroidal component, virtually no disk component
14. Galaxy A type of galaxy that is neither spiral nor elliptical
15. matter: An undetected form of mass that emits little or no light but whose existence we infer from its gravitational influence
16. of galaxies: up to a few dozen galaxies per group
18. Galactic Nucleus: If the center of a galaxy is unusually bright we call it this

1. Prominences, Caused by magnetic activity and erupts high above the Sun’s surface
3. Component, A part of a spiral galaxy that has a bulge and halo, old stars, and few gas clouds
4. Planets: A place contains the basic necessities for life as we know it, including liquid water
6. energy: An unknown form of energy that seems to be the source of a repulsive force causing the expansion of the universe to accelerate
7. Flares, Caused by magnetic activity and sends bursts of X-rays and charged particles into space
11. Galaxy: A type of galaxy that has a disk like a spiral galaxy but much less dusty gas (intermediate between spiral and elliptical).
13. of galaxies: has up to hundreds to thousands of galaxies
17. Gravity crushes all the matter into a single point