Across
- 3. Thermal heat left in the universe after the Big Bang explosion.
- 5. Invisible force pulling two objects that has mass toward each other.
- 6. Continues to get bigger and larger like the universe.
- 8. Anything that has mass and takes up space or volume.
Down
- 1. Explosion where pressured contents of the universe quickly expanded.
- 2. The study of the origin, structure, and future of the universe.
- 4. Everything that exists like matter and space all together forms a blank.
- 7. System of millions and billions of star together with gas and dust.