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10 Cards in this Set
- Front
- Back
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Geocentric model |
Sun moon and planets orbit us |
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Heliocentric model |
Everything orbits the sun |
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Church |
disagrees with heliocentric model |
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Galileo |
Used science to prove heliocentric |
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How we know about space |
Telescopes Luminous objects Non-luminius objects |
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Stars: Stage 1 |
Nebulae - Collection of dust gas and rock (Eg. Dark Nebula, Reflection Nebula, Emmission Nebula, Planetary Nebula) |
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Stars: Stage 2 |
Protostar: Gravity pulls the particles together. Gravitational potential energy is turned into heat. Protostar is formed. |
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Stars: stage 3 |
Main Sequence: Forces of attraction are balanced by thermal expansion forces by nuclear fusion and high heat. Stars are nuclear reactors that use hydrogen as fuel. A star releases energy by converting hydrogen and helium into heavier elements. |
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Stars: stage 4 |
Red giant: runs out of hydrogen Cools down Gets darker and redder Grows 4 times bigger |
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Stars: stage 5 |
Death: small stars collapse and create white dwarf. Big stars make supernovas and black holes |
