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Catalog of Nearby Exoplanets (exoplanets.org)

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Doppler-Effekt (Physlet)

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Newtonian telescope-schematic

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Telescope - schematic

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Telscopes - Pictures

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Linsen - Bildkonstruktion

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Fernrohre - Animationen

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Lenses - java applet

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Telescopes: Eyes to the Universe (Project-Based Learning)

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Average: 4.3 (10 votes)
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Stellar Evolution: About Red Giants and White Dwarfs (Inquiry Based Teaching)

4.142855
Average: 4.1 (7 votes)
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