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Planets | |
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A planet is a body in orbit around a star. In our Solar System, the name Planet has traditionally been confined to the nine major bodies shown in the picture above. Moons and smaller bodies are referred to as Minor Planets.
The size below which a planet becomes a mere "asteroid" has been somewhat arbitrary, and recent discussion has determined, with significant objections, that Pluto be downgraded to Dwarf Planet status. A planet does not give off its own light, this means it can exist up to a size of around one twentieth the mass of our sun - beyond that, gravitational forces produce such compression and associated heat that nuclear fusion is triggered and a star begins to develop. Click on links below to investigate..... |
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The Planets:
Links to other Sites:
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