Reference Pages

  • Drake Equation: Estimating the Odds of Finding E.T.

    Drake Equation: Estimating the Odds of Finding E.T.

    March 26, 2014 | Reference

    The Drake Equation is used to estimate the number of communicating civilizations in the cosmos, or more simply put, the odds of finding intelligent life in the universe.
    Read More

  • What Is The Hubble Constant?

    What Is The Hubble Constant?

    March 21, 2014 | Reference

    The Hubble Constant is the unit of measurement used to describe the expansion of the universe. The cosmos has been getting bigger since the Big Bang kick-started the growth about 13.82 billion years ago.
    Read More

  • Kepler Space Telescope: Exoplanet Hunter

    Kepler Space Telescope: Exoplanet Hunter

    March 04, 2014 | Reference

    NASA's Kepler Space Telescope is an observatory in space dedicated to finding planets outside our solar system.
    Read More

  • Does the Moon Rotate?

    Does the Moon Rotate?

    February 28, 2014 | Reference

    Yes, the moon rotates on its axis. The moon's rate of rotation nearly matches its orbital period, which keep the same side facing Earth.
    Read More

  • What is Space?

    What is Space?

    February 28, 2014 | Reference

    Space is the zone above and around our planet where there is no air to breathe or to scatter light. Space is a vacuum, but it is far from empty.
    Read More

  • How Old is Earth?

    How Old is Earth?

    February 27, 2014 | Reference

    Scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years.
    Read More

  • What is a Satellite?

    What is a Satellite?

    February 27, 2014 | Reference

    Artificial satellites from Earth have only populated space since 1957, but there are now hundreds of thousands of objects from our planet in orbit.
    Read More

  • How Long Does It Take to Get to Mars?

    How Long Does It Take to Get to Mars?

    February 13, 2014 | Reference

    If you wanted to pay a visit to the red planet, how long would it take? The answer depends on a number of things …
    Read More

  • Ganymede: Facts About Jupiter's Largest Moon

    Ganymede: Facts About Jupiter's Largest Moon

    February 13, 2014 | Reference

    Ganymede would easily be classified as a planet if were orbiting the sun rather than Jupiter.
    Read More

  • Edmond Halley Biography: Facts, Discoveries and Quotes

    Edmond Halley Biography: Facts, Discoveries and Quotes

    February 12, 2014 | Reference

    Edmond Halley is best remembered for predicting the orbit of the comet that was later named after him. Besides astronomy, he also made significant discoveries in the fields of geophysics, mathematics, meteorology and physics.
    Read More