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Observing the Lunar Motion through the Stars -Timing Grazing Occultations of Stars by the Moon

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Κατασκευή & συναρμολόγηση του φορητού εκπαιδευτικού τηλεσκοπίου Spica

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Globular Star Cluster classification

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Planetary Nebulae formation and classification

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Calculating the speed of light

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Discovering the Speed of Light

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Light Pollution - How many objects can I see at night?

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Average: 4 (2 votes)
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