Stars

2. powerful and luminous explosion that occurs at the end of a massive star's life cycle, resulting from the collapse of its core.
4. The force that attracts two bodies towards each other, responsible for holding stars and planets together.
6. A region in space with a gravitational pull so strong that nothing, not even light, can escape from it, formed from the remnants of a massive star.
8. An even larger star than a red giant, which has expanded significantly and can undergo fusion of heavier elements.
9. A massive, luminous sphere of hot gases, primarily hydrogen and helium, held together by gravity.
10. The dense remnant of a medium-sized star after it has shed its outer layers, typically about the size of Earth.
11. An extremely dense star formed from the remnants of a supernova, primarily composed of neutrons.

1. An early stage in the formation of a star, characterized by a hot core that forms when a knot of material in a molecular cloud collapses under gravity.
3. A stable phase in a star's life cycle where hydrogen fusion occurs in the core, producing energy and light.
4. A phase in a star's life cycle that occurs when it exhausts hydrogen in its core, causing it to expand and cool, resulting in a larger, redder star.
5. A region in space where new stars are born from clouds of dust and gas.
6. A theoretical end state of a white dwarf that has cooled and no longer emits significant heat o
7. The process in which two light atomic nuclei combine to form a heavier nucleus, releasing energy; this occurs in the cores of stars.