P1- Topic 1,2&3
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?- Created by: Savannah
- Created on: 10-02-13 19:41
Other questions in this quiz
2. Describe the main features of the Geocentric Model
- Nicolous Copernicus
- Ptolomy, Earth was in the centre, and everything orbitied the earth including the sun and all of the other planets. The earth was stationary. Moon, Sun, Planets and stars moved around the earth in circular orbits.
- Sun was in the centre. Planets moved around the sun in a circular motion.
3. What happens after that?
- The hydrogen in the core begins to run out and the star swells into a red giant (it becomes red because the surface cools)
- Expands and kills life on earth
4. How long does a main sequence star last?
- 1 million years
- it lasts for several billions of years
- couple of years
5. What are the two stages of a small star's life?
- Planetary nebula and a white dwarf
- Super nova
- Neutron Star
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