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20 Cards in this Set
- Front
- Back
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inner layer of the sun that makes the light
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photosphere
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middle layer of the sun which makes color
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chromosphere
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outer layer of the sun which is only visible during a solar eclipse as a white halo
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corona
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hydrogen atoms join together to form helium; creates sun's energy
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nuclear fusion
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Where does nuclear fusion happen?
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The core of the sun
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sunspot
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areas of gas on the sun that are cooler than gases around them
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What is the cycle of a sunspot?
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11 years
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What temperature are sunspots?
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They are cooler
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prominence
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reddish loops of gas that link different sunspots
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astronomical unit (A.U.)
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93,000,000 mi away from the sun
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Why does prominence affect tv, radio, or other signals?
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Too much electromagnetic radiation is released
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How long does it take light to reach Earth from the Sun?
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8 minutes
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How long is one day on Mercury?
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4222.6 hrs (a.k.a 176 earth days)
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terrestrial
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Planet made of rock
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How long does it take Mercury to rotate?
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Mercury rotates 3 times in 2 years
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Why doesn't Mercury have atmosphere?
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The gases were blown off by solar winds
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solar winds
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stream of electrically charged particles from the corona of the sun
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What type of rotation does Venus have?
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a retrograde rotation, which means it rotates backwards
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Why are there very high temperatures on Venus?
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the green house effect keeps solar heat inside the planet
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What did Galileo discover?
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1. Jupiter's 4 moons
2. Venus has phases like the moon 3. 1st scientist to use a telescope 4. Earth revolves around the sun |
