Space

3. Unidentified flying object.
4. Is the second planet from the Sun in our solar system.
5. Is an exoplanet located about 600 light-years away from Earth.
10. A huge collection of stars, gas, and dust held together by gravity.
13. Are a group of twelve constellations that lie along the path of the Sun across the sky.
14. Is the curved path that an object.
15. Is a theoretical tunnel-like structure that could connect two separate points in spacetime.
18. Is a vast cloud of gas and dust in space.
23. Group of stars that form a recognizable pattern or shape in the night sky as observed from Earth.
25. An invisible substance that makes up a large part of the universe's mass and doesn't emit light.
26. The entire illuminated side of the Moon to be visible from Earth.

1. Point in space with gravity so strong that nothing can escape, not even light.
2. Refers to the space between stars.
6. Is a highly energetic and distant active galactic nucleus.
7. Is an optical instrument used to observe distant objects in space.
8. Is the third planet from the Sun in our solar system.
9. Earth's natural satellite.
11. Is the star at the center of our solar system.
12. Once considered the ninth planet.
16. Are commonly used for space exploration.
17. Is the largest planet in our solar system.
19. A fictional extraterrestrial creature from the "Alien" franchise.
20. Is a unit of length in the metric system equal to one septillionth (10^-24) of a meter.
21. Creature, or entity that originates from a location outside of Earth or its atmosphere.
22. Year It's a unit used in astronomy to measure vast distances in space.
24. Refers to the lunar phase when the moon appears as a semicircle in the sky.