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7 Cards in this Set
- Front
- Back
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How much is one astronomical unit?
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=150,000,000 km
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one light year?
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=speed of light*60sec/min*60min/hr*24hrs/day * 365 days/year.
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what causes the seasons?
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the angle of the earths axis causes it.
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what is a refractor telescope?
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it makes images with a lens
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what is a reflecting telescope?
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the only difference in this telescope is that it has a mirror
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ccds are usefull in what way to a telescope?
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they can be used to take high resolution pictures; and data
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what are large telescopes usefull for?
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one, they have better resolution, two they gather more light allowing study of very faint sources
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