Across
- 4. the coming together and cohesion of matter under the influence of gravitation to form larger bodies.
- 9. Momentum, the quantity of rotation of a body, which is the product of its moment of inertia and its angular velocity.
- 10. Planets, a planet that is composed primarily of silicate rocks or metals.
- 11. the process or state of breaking or being broken into small or separate parts.
- 14. a large body of matter in orbit around the sun or a star and thought to be developing into a planet.
Down
- 1. protostar; especially the gaseous cloud that underwent gravitational collapse to form the sun.
- 2. the degree of compactness of a substance.
- 3. matter, Material found between the planets of our Solar System.
- 5. theory, Our solar system formed about 4.6 billion years ago.
- 6. Planetology, a branch of space science and planetary science in which different natural processes and systems are studied by their effects
- 7. a minute planet; a body that could or did come together with many others under gravitation to form a planet.
- 8. Accretion Theory, In this model rocky core forms through the coagulation of planetesimals until it is sufficiently massive to accrete a gaseous envelope.
- 12. Nebula, describes the formation of our solar system from a nebula cloud made from a collection of dust and gas.
- 13. Planets, sometimes known as gas giants. However, many astronomers apply the latter term only to Jupiter and Saturn