Key Vocab Nov 1

2. The process by which two light atomic nuclei combine to form a heavier nucleus, releasing energy, and is the primary source of energy in stars.
5. Dwarf A small, dense star that is the remnant of a low or medium mass star, which has exhausted its nuclear fuel and shed its outer layers.
8. Hole A region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.
9. Dwarf The smallest and coolest type of main-sequence star, with a low mass and long lifespan.
10. A highly magnetized rotating neutron star that emits beams of electromagnetic radiation out of its magnetic poles.
11. The total amount of energy emitted by a star, galaxy, or other astronomical object per unit of time.
14. A powerful and luminous explosion occurring at the end of a star's life cycle, often resulting in the formation of a neutron star or black hole.
17. Star A very dense stellar remnant composed mainly of neutrons, formed from the collapse of a massive star after a supernova explosion.

1. Nebula A ring-shaped nebula formed by the expansion of gases from a dying star.
3. The range of electromagnetic radiation emitted by an object, revealing its physical properties and composition when analyzed.
4. A vast cloud of gas and dust in space, often serving as a nursery for new stars.
6. Diagram A graphical plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.
7. Giant A late-stage star that has expanded and cooled, increasing in size and luminosity as it exhausts hydrogen in its core.
12. A transient astronomical event that causes the sudden brightening of a star, typically involving a binary star system where one star accumulates material from its companion.
13. An extremely luminous and distant celestial object powered by a supermassive black hole at its center.
15. Supergiant A very large and luminous star, more massive than a red giant, that has entered the later stages of stellar evolution.
16. Sequence A continuous range of stars that fuse hydrogen into helium in their cores, representing the longest stage in a star's life cycle.