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Summary Space Physics and an Overview of the Formation of Stars
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This document provides an effective, mark-by mark strategy to gain full marks in a long winded 6 marker on space physics.
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Dust and gas pulled together by gravity into a nebula (1)The nebula becomes hot and dense and becomes a protostar(2)
This protostar starts nuclear fusion of hydrogen into helium (3)
This process remains stable for a very long time as the star remains a
Main Sequence Star. (4)
Hydrogen fusion begins to slow down/stop as hydrogen runs out…
Same size as Sun Bigger than Sun
Once hydrogen has run out, the Once hydrogen has run out, the
star expands into a red giant. (5) star expands into a red
supergiant. (5)
Nuclear fusion involving helium A supernova explosion happens.
nuclei begins forming heavier (6) Elements heavier than iron
elements (5a) on the periodic table are formed.
(6a)
Star stops fusion and then begins
to lose energy as nuclear fusion The remains of the supernova can
isn't happening. The star turn into one of two things:
collapses because the (inward)
force of gravity is greater than A black hole - high density, a
the (outward) force of fusion. (6) great amount of matter in one
small volume.
Star becomes a white dwarf (6a) Or
and gradually loses energy to A neutron star - a star which is
become a black dwarf. (6b) packed full of neutrons. (6b)
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