Across
- 3. Ripples in spacetime caused by massive objects moving quickly, like two black holes colliding.
- 7. The amount of “stuff” or matter inside an object.
- 8. The speed an object needs to move fast enough to break free from a planet’s or star’s gravity.
- 10. The act of finding or measuring something that is normally hard to see or feel.
- 12. The path one object takes as it moves around another object because of gravity.
- 13. A place in space where gravity is so strong that nothing—not even light—can escape from it.
Down
- 1. The invisible area around an object where its gravity can pull on other objects.
- 2. A rule that says gravity gets much weaker as you move farther away from an object — and it decreases very quickly.
- 4. Binary Black Holes)Two massive objects (like black holes) orbiting each other.
- 5. (of spacetime)How space bends around mass. More mass = deeper bend.
- 6. (of a wave)How big the wave is — for gravitational waves, it’s how much space is stretched or squeezed.
- 9. A “fabric” that combines space and time. Objects with mass bend this fabric, and that bending is what we feel as gravity.
- 11. Pulling and stretching that happens when gravity is stronger on one side of an object than the other.