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18 Cards in this Set
- Front
- Back
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What causes the gravitational pull?
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Tides on earth cause gravitational pull of the moon and sun.
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Winter Season
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*Northern hemisphere is tilted away from the sun.
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Summer solstice
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*June 21
*Longest day *shortest night *Sun is the highest |
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Revolution
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the orbit of the earth around the sun.
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Waxing
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moon phases where the amount of light is increasing or brighter
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astronomical unit (AU)
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the average distance between the earth and the sun is 193 million miles away
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Nuclear fusion
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energy produced by the stars
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Aurora borealis
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charged particles or ions
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photosphere
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*the only visible atmosphere
*lowest layer of the sun's atmosphere |
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corona
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*top layer of the sun's atmosphere
*gas flows outward |
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solar cycle
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*solar minimum, maximum, and maximum
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Constellations
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group of stars that form a pattern.
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Sunspots
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*cooler areas on the photosphere
*appears darker that the areas around the sun |
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Solar Flares
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violent eruptions of particles and radiation from the surface of the sun
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Prominence
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*arc of gas ejected from the chromosphere
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Milky Way
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spiral arm where the sun and earth are located
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Sun
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*average size star
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Big Bang Theory
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*theory that the universe bagan as a point and has been expanding ever since.
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