• Learn About Saturn's Moon, Tethys

    Saturn has many fascinating moons and Tethys is no exception. Two massive surface features, a body of nearly pure water ice and two Trojan companions make it unique amongst the solar family of celestial bodies.
    By Rod Martin, Jr. August 12, 2011 

  • What is the Habitable Zone

    Astronomers are looking for planets that might contain life. Usually this means that the planet has to be close to a star, but not too close. It has to be far from the star, but not too far. In either case, extreme temperatures may prevent the development...
    By George Garza August 11, 2011 

  • Celestial Fireworks - Supernova Remnants

    On average, once every half century in our Milky Way galaxy, a star blows itself apart and nearly outshines the entire galaxy. The star effectively spills its guts upon the galactic landscape, enriching it with heavier elements like iron, silver, gold...
    By Rod Martin, Jr. August 11, 2011 

  • A Brown Dwarf in the Solar System

    Recent speculation revives the late nineteenth century search for "Planet X," a large object thought to reside beyond Neptune. The reasons are different. And instead of a massive planet, the object is thought to be a brown dwarf "star."
    By Rod Martin, Jr. August 11, 2011 

  • The Beautiful Vega Star: Harp of Orpheus

    Vega is the fifth brightest star in the night sky. It is in the constellation Lyra. It is one of the polar stars, meaning that it will be the north star at a future date. It is part of the summer triad, and Vega is close to the Solar Apex. The distance...
    By George Garza August 8, 2011 

  • Trojan Asteroids: Jupiter's Own Asteroid Belt

    Some asteroids orbit the Sun along with Jupiter. These asteroids are called Trojan's and have found homes at a special place in Jupiter's orbit where the forces of gravity and velocity work together and keep the asteroids in Jupiter's orbital...
    By MJ Logan August 8, 2011 

  • The Moon's Our Home: Lunar Craters Named After Famous People

    The craters on the Moon have been assigned names, some famous. some not. Read the stories of a few fascinating folks whose names have been given to Moon craters.
    By Arlene McKanic August 8, 2011 

  • A Brief History of Astronomy: Classical, Medieval, and Renaissance

    The prevailing cosmology throughout the Middle Ages was geocentrism, with Earth as the center of the Universe. The ancient Greeks had "solved" the biggest problem in astronomy up to that point - the orbital paths of the planets - and it didn't...
    By Kayar August 7, 2011 

  • Edmund Halley: Facts and Discoveries

    Edmund Halley was best known for identifying the correct period of time for the return of what would become known as Halley's Comet. Among his other studies, he observed stars and planetary motion, identified magnetic fields and attempted to date...
    By Jason C. Chavis August 7, 2011 

  • Famous Women Working in Space Science and Astronomy

    Throughout the course of history, women in astronomy have had a profound effect on space science. Today, women hold some of the most prominent positions in the entire industry. Along with individuals, a number of organizations have been developed to focus...
    By Jason C. Chavis August 7, 2011 
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