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Astronomy

  • What is Albedo?

    Albedo is the measure of the reflective nature of an object. This dimensionless number provides important clues about celestial objects and can even be used as an indicator of global warming. Read on for more information about albedo.
    Published by rojarose (2056 pts) on Nov 16, 2009 to
    Space Articles

  • What is Retrograde Motion of the Planets?

    As we view the motion of the planets, they normally move from east to west. Yet, once in awhile they will seem to change direction and move backwards.This latter is what is referred to as Retrograde Motion of the planets.
    Published by SBrno (1623 pts) on Nov 9, 2009 to
    Space Articles

  • Astronomical Distance Measurements

    The distances between the planets, and especially the stars and galaxies, are so vast the measurements we use here on Earth, kilometers and miles, are too cumbersome. Astronomers have developed other units to measure distances in the solar system and the universe.
    Published by George Adcock (3791 pts) on Nov 8, 2009 to
    Space Articles

  • Nothing But the Facts About Jill Tarter

    Dr. Jill Tarter is the Director of the Center for SETI Research, the program that searches the sky for alien life using radio frequencies. Tarter is one of the most awarded scientists working in the field of astronomy today and notable for her characterization in Carl Sagan's “Contact” novel.
    Published by Jason C. Chavis (4377 pts) on Nov 7, 2009 to
    Space Articles

  • Nothing But The Facts About The Constellation Orion

    The Orion constellation is second only to the constellation of the Big Dipper in recognizability. The constellation was well known to the ancient Greeks with its own hero's and villains and is one of a handful of constellations that are visible from both the northern and southern hemispheres.
    Published by George Garza (1900 pts) on Oct 29, 2009 to
    Space Articles

  • What Are The Minor Planets?

    The minor planets become a topic of heated discussion after the decision of the IAU to strip Pluto of its status as a planet and to consider it as a minor planet in 2006. Read on to find out more about these minor elements of our solar system.
    Published by rojarose (2056 pts) on Oct 28, 2009 to
    Space Articles

  • Stellar Classification

    How can you talk about stars if you don't know how they are classified -- or, if you don't know what the different classification systems out there are? This article goes through and describes the basic structure of the Harvard and Yerkes spectral classification systems and how they're used.
    Published by allychevalier (14652 pts) on Oct 28, 2009 to
    Space Articles

  • Facts and History about the Geminid Meteor Shower

    The Geminid meteor shower is so named because its trail of meteors is traced back to the region of the constellation Gemini. The Geminid shower produces the brightest meteors of any shower. A spectacular event is expected on the 13th and 14th December 2009.
    Published by Sushma (3052 pts) on Oct 28, 2009 to
    Space Articles

  • Nothing but the Facts About the Constellation Libra

    The constellation Libra is a faint collection of stars positioned between Virgo and Scorpius. Named Libra because of its resemblance to scales, its brightest stars come together to form a quadrangle. Libra is also represented as one of the signs of the Zodiac.
    Published by Jason C. Chavis (4377 pts) on Oct 27, 2009 to
    Space Articles

  • What is the IAU?

    The IAU is the International Astronomical Union, a dynamic, engaged international organization made up of professional astronomers. This organization is a leading scientific body that encourages the study of astronomy worldwide.
    Published by johnsinit (12600 pts) on Oct 27, 2009 to
    Space Articles
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