Life Cycle of a star W3

5. A hypothetical, completely cooled remnant of a white dwarf that no longer emits heat or light.
8. An early, dense concentration of gas drawn together by gravity that is heating up before nuclear fusion starts.
9. __________ Magnitude: The faintest brightness a star can have and still be seen by the naked eye or through a telescope against background light.
10. _________ Magnitude: The true, intrinsic brightness of a star if it were viewed from a standard reference distance of 10 parsecs.
12. An exceptionally dense remnant made almost entirely of tightly packed neutrons, formed after a high-mass star collapses.
15. A state of balance inside a star where gravity pulling matter inward is matched by radiation pressure pushing outward.
16. The process where intense heat and pressure smash lighter atomic nuclei together to make heavier elements, releasing massive energy.
17. Giant An aging star that swells dramatically in size and cools at the surface after using up the hydrogen fuel in its core.

1. A powerful, catastrophic explosion of a massive star at the end of its life cycle.
2. _________ Magnitude: A measure of how bright a celestial object appears to an observer on Earth, influenced by its distance.
3. The total amount of light energy a star radiates into space per second.
4. A scatter plot that graphs stars to show the relationship between their surface temperature and absolute brightness.
6. The hot, dense stellar core left behind after a low- or medium-mass star has shed its outer layers.
7. An expanding, glowing shell of gas ejected into space by a dying low- to medium-mass star.
11. A massive interstellar cloud of gas and dust where new stars begin to form.
13. The stable middle phase of a star's life where the outward push of fusion perfectly balances the inward pull of gravity.
14. An extremely compact region of space with gravity so strong that nothing, not even light, can escape its boundary.