Across
- 4. as galaxies become ____ they will drift apart and stop forming stars
- 5. A cluster or group of galaxies can be made up of smaller ______ and galaxies.
- 7. if the universe stops expanding it will _____
- 8. Every object in the universe is part of a larger ______
Down
- 1. Scientists can check the age of the _____ by checking the size of it
- 2. Scientists think the universe may expand _____
- 3. the prevailing scientific model for the origin of the universe and explosion that started the universe known as the _____
- 6. the science of the origin and development of the universe