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10 Cards in this Set
- Front
- Back
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Red Giants
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Larger in size to the sun, a low surface temperature of 3000K .ex:Betelgeuse
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White Dwarfs
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These stars are much smaller than the sun, and have a high surface temp. of 20,000K,ex:Sirius B
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Neutron stars
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Has undergone gravitational collapse ,and their core is made up of neutrons.
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Supernovae
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When a star experiences a shock wave eroding the surface of the core.ex: 1987- SK 69202
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Pulsars
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rotating neutron stars.They als oemit beams of electromagnetic radiation.Ex: in the crab nebula
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Black holes
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Gravitatiojnal field at the Surface of the star is strong enough to prevent any electromagnetic waves escaping the surface.They do not emit any light.
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Binary stars
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Two stars rotating about a common centre
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Cepheid variables
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Luminosities vary regularly, generally with a period of several days.
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Visual Binary
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Stars that can visually be observed,orbittin about a commen cnetre.Their masses can be measured in principal.
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Eclipsing binary
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when a pair of stars periodically eclipse each other.Thus the brightness of the system varies periodically.
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