James Webb Space Telescope

4. Useful unit for measuring the distances between astronomical objects
5. Region of space containing a huge amount of mass compacted into an extremely small volume
8. Explosive death of a star whose energy output causes its expanding gases to glow brightly for weeks or months
11. Lightest and most abundant chemical substance in the universe
13. Cloud of gas and dust located between stars and/or surrounding stars
16. Planet that orbits a star other than the Sun
17. Matter that is too dim to be detected by telescopes, astronomers infer its existence by measuring its gravitational influence
18. Collection of stars, gas, dust, and dark matter bound together by gravity
19. Invisible, nearly massless subatomic particles that are electrically neutral and can travel at nearly the speed of light without being deflected by magnetic fields or absorbed by matter

1. One of the five points at which an artificial satellite or small cosmic object, like an asteroid, can remain in a position of equilibrium
2. Sixth planet in the Solar System, noted for its obvious ring structure
3. Study and interpretation of a celestial object’s spectrum
6. Stretching of light to longer, redder wavelengths as it moves through space due to the expansion of the universe
7. Distance between two wave crests
9. Process by which ions are produced, typically by collisions with other atoms or electrons, or by absorption of electromagnetic radiation
10. Explosion caused when two neutron stars or a neutron star and a black hole merge. Short gamma-ray bursts are also thought to originate from such a merger
12. Neutron star that emits rapid and periodic pulses of radiation
14. Theory of physics that describes the dynamical behavior of matter and energy
15. Part of the electromagnetic spectrum that has slightly lower energy than visible light, but is not visible to the human eye