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  • Just What Is That Bright Star In The Night Sky?

    You're out one evening and a bright object in the sky catches your attention. What is it? A planet, a star, a satellite, maybe a comet or shooting star, or maybe it's a UFO? It could be any of these and more but read on before you phone in that UFO sighting...
    Published by RC Davison (3,079 pts ) on Oct 7, 2009 to
    Space Articles

  • What Are Exoplanets?

    Sound exotic? Exoplanets are being discussed more and more often in astronomy, yet many people are left puzzled by what precisely an exoplanet is. This article provides an overview, including a definition, examples, how we detect them and the role they play in astronomy today.
    Published by allychevalier (14,652 pts ) on Jul 27, 2009 to
    Space Articles

  • What is the Difference Between Rotation Period (Sidereal Day) and Planetary Day?

    What is a sidereal day? Why is a planet's day not the same as its rotation period? Find out the difference between these two measurements and learn fascinating facts about the peculiar rotation of the inner planets.
    Published by Robyn Broyles (11,124 pts ) on Feb 10, 2009 to
    Space Articles

  • Images of Extrasolar Planets

    Extrasolar planets (exoplanets) are notoriously difficult to see. Though over 300 have been discovered, no photos are available for most of them. In this article, see two unique images of exoplanets.
    Published by Robyn Broyles (11,124 pts ) on Jan 16, 2009 to
    Space Articles
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