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Polar lights Aurora over Fairbanks, Alaska. They appear when energy-rich particles from the sun enter the earth´s atmosphere close to the magnetic poles. These particles come with the solar winds and so polar lights can be seen numerously after solar eruptions. |
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Radiotelescopes These radiotelescopes in Socorro, New Mexico, USA search the sky. They are able to receive radiation from galaxies billions of light-years away. |
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Telescope The telescope in Arecibo. |
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Astronaut I The famous picture. |
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Astronaut II Another famous picture! |
