Astro-words

8. A mysterious substance that does not emit or interact with electromagnetic radiation but exerts gravitational force.
10. Detected for the first time in 2015 by the LIGO experiment.
13. A cloud of gas and dust in space, often the birthplace of stars.
14. Cosmic Microwave Background.
17. The phenomenon that occurs when one celestial body moves into the shadow of another. (Clue: Can be solar or lunar)
20. A highly dense, compact star primarily composed of neutrons.
21. The study of the origin, evolution, and eventual fate of the universe.
22. The study of the origin, evolution, and potential for life in the universe.
24. The theoretical event marking the beginning of the universe.
25. A late stage in the life of a low to medium mass star, characterized by its large size and red color.

1. A subatomic particle with extremely low mass and no electric charge, emitted in various nuclear reactions. (Clue: Comes in three flavors: electron, muon, and tau.)
2. An extremely bright and distant object powered by a supermassive black hole at its center.
3. A small, shiny, white, dead star.
4. The seventh planet from the Sun, notable for its unique sideways rotation axis and pale blue color.
5. A state of matter consisting of ionized gas where electrons are no longer bound to atoms.
6. Hubble Space Telescope
7. A planet that orbits a star outside our solar system.
9. A massive system of stars, gas, dust, and dark matter bound together by gravity.
11. The boundary surrounding a black hole beyond which nothing can escape.
12. A unit of distance used in astronomy, equivalent to about 3.26 light-years.
15. A powerful explosion that occurs at the end of a massive star's life cycle.
16. Exhibits a bright coma and a tail when near the Sun.
18. The bending of light by the gravitational field of massive objects, predicted by Einstein's theory of general relativity.
19. The path followed by an object as it revolves around another object in space due to gravity.
23. Indicates the expansion of the universe.