Across
- 3. physical theory about space and time
- 5. A region of space having a gravitational field so intense that no matter or radiation can escape.
- 6. The collapsed core of a supermassive star
- 7. A system of two stars that orbit each other
Down
- 1. 'ripples' in space-time caused by some of the most violent and energetic processes in the Universe
- 2. rotating neutron core that is highly magnetized
- 4. The Laser Interferometer Gravitational-Wave Observatory