Across
- 2. he stated that the sun’s companion star colliding with another to form a proto-planet that breaks up to form Jupiter and Saturn.
- 4. a theory that fails to account for the distribution of angular momentum in the solar system
- 7. they are made of materials with high melting points
- 10. they are called the gas giants
Down
- 1. he proposed the accretion theory that the Sun passed through a dense interstellar cloud and emerged with a dusty, gaseous envelope that eventually became the planets
- 3. A Nobel prize winner won the compositional studies on meteorites in the 1950s
- 5. a space probe built by the European Space Agency and launched on 2 March 2004
- 6. part of the galaxy that the sun and the planets are around it
- 8. refers to an object that spins in the same direction as its orbit
- 9. located in the Milky Way galaxy a huge disc- and spiral-shaped aggregation of about at least 100 billion stars and other bodies