Unit 1 & 2 Vocab

3. A galaxy that emits strong radio waves, powered by a supermassive black hole.
6. A dense, compact remnant of a massive star after a supernova explosion.
7. The total amount of light energy a star or celestial object emits.
10. A galaxy without a distinct shape, often chaotic in appearance.
11. A unit of distance in space, equal to about 3.26 light-years.
15. A type of variable star that pulsates regularly, helping to measure cosmic distances.
21. A spherical region of stars and dark matter surrounding a galaxy.
23. A galaxy with a rotating disk, central bulge, and spiral arms.
24. A stream of charged particles released from the Sun into space.
25. A larger collection of galaxies, typically containing hundreds or thousands of members.
26. A cloud of gas and dust in space where stars can form.
27. An extremely bright and distant object powered by a supermassive black hole at its center.

1. The supermassive black hole at the center of the Milky Way galaxy.
2. The stage in a star’s life when it is stable and burning hydrogen into helium.
4. Star A younger star rich in heavier elements, often found in spiral arms.
5. A region in space where gravity is so strong that nothing, not even light, can escape.
7. The group of galaxies that includes the Milky Way, Andromeda, and several others.
8. A star whose brightness changes over time.
9. A large, bright loop of gas extending from the Sun’s surface.
12. The hot, outermost layer of the Sun’s atmosphere.
13. A massive system of stars, gas, dust, and dark matter, bound together by gravity.
14. The central region of a galaxy, often containing a supermassive black hole.
16. A system of two stars orbiting each other due to gravity.
17. Star An older star with fewer heavy elements, often in a galaxy’s halo.
18. A small collection of galaxies that are gravitationally bound.
19. The true brightness of a star if it were placed at a standard distance from Earth.
20. A galaxy shaped like an elongated sphere, with older stars and little gas or dust.
22. The apparent shift in position of an object when viewed from different angles, used to measure distance.