Solar System

  • A Description of Our Milky Way - a Spiral Galaxy

    It is easy to "miss the forest for the trees." Let's consider the forest in which Earth is located—our own galaxy—the Milky Way. What is the structure of the Milky Way? What kind of galaxy is it? Is it remarkable? Finally...
    By VinceSummers July 14, 2011 

  • The Definition of a Planet

    Until recently we had been accustomed to there being nine planets in our Solar System but then Pluto, the farthest planet from our Sun, got demoted from its planetary status. The debate over Pluto's status led to a redefining of the term planet.
    By Darlene Zagata June 30, 2011 

  • About Canyons on Mars

    The latest information on what made the canyons on Mars, the Grand Canyon compared to the Mars canyon Valles Marineris and the uncertain relationship between the canyons of Mars and the presence of water on the red planet.
    By Todd McCall June 30, 2011 


  • Let's Find Out: What is the Weather Like on Jupiter

    What do you know about Jupiter's weather? Did you know that the Great Red Spot on Jupiter is a storm? There is a lot more going on in Jupiter's atmosphere - read on to find out more.
    By pms19650 June 30, 2011 

  • Importance of Sedna in Our Solar System

    Sedna, a very distant planetoid with a very long, eccentric orbit around the Sun, has much to tell us about the origins of the Solar System.
    By Arlene McKanic June 28, 2011 

  • Solar Probe Plus May Solve Many of Sun's Mysteries

    NASA’s Solar Probe Plus will become the first spacecraft to plunge into the Sun. It won’t enter the Sun’s surface, but its strange outer atmosphere, the corona, where the temperature is millions of degrees and the solar wind is accelerated...
    By George Adcock June 27, 2011 


  • Nothing But The Facts About The Sun

    Essential facts about our closest star, the Sun along with some amazing facts that you might not be aware of!
    By nain June 27, 2011 

  • A Comparision of the Inner and Outer Planets

    Someone might ask, why is our Solar System divided in two and what is the difference between the inner planets and outer planets? Read this article to discover the answers.
    By Aggeliki K. June 22, 2011 

  • Exploring Lunar Phases and the Gibbous Moon

    The Moon remains one of the most fascinating objects in the night sky. This article will give a little insight into how the lunar phases occur, what they are and when to observe the gibbous phase during night and daytime.
    By Aggeliki K. June 17, 2011 

  • The Nature of Gravity in Space

    What do we know about gravity? We know that it keeps us firmly rooted to the surface of the Earth, and it keeps the Earth in orbit about the Sun. We know that it is the reason galactic clusters form and black holes form, but what is gravity and how...
    By RC Davison June 13, 2011 
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