Tools of the Astronomer

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Erica B


Date added:

November 17, 2012








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2 / 411


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He saw craters on the Moon, dark spots on the surface of the Sun, tiny moons moving around Jupiter. No one else had ever seen these things. With the modern telescopes we use today, we can see many many more things. Light from planets, stars and galaxies spreads itself on Earth, and a telescope collects this light and lets us look at the object the light came from...
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Some telescopes, called refracting telescopes, collect and focus light through a glass lens. Another type, the reflecting telescopes, reflect light on a glass mirror. The bigger the telescope the more light it collects, giving us a better view of what we want to look at. Some don't have just one big mirror, it has many little mirrors that fit together like bathroom tile...
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