• Space Telescopes

    Telescopes on Earth do not take the best pictures of planets, stars or galaxies. Light from these objects is scattered by the atmosphere or obscured by light from cities. Even the best Earth based telescopes, situated high on mountaintops far away from...

  • The Astronomical Telescope

    An astronomical telescope consists of two lenses. The first lens, the objective lens, focuses parallel rays from a distant object to the focal point of the first lens. The focal points of the objective and eyepiece lenses coincide – this is called...

  • A Level Maths Notes - S1

  • My Favourite Educational Links

    https://freeexampapers.com Past papers, all subjects, all levels. Student Forum Popular student forum. http://library.cern.ch/derobbio/mathres/mathres1.html#e-jouh Undergraduate and Postgraduate Reference Library with lots of e-books and e-journals....

  • The Curtis - Shapley Debate

    In the early part of the twentieth century there was much disagreement between astronomers about the structure and size of the Universe. This came to a head in a debate between the astronomers Heber Curtis and Harlow Shapley organised by the National...

  • Neptunes Great Dark Spot

    Neptune's Great Dark Spot is an collection of atmospheric phenomena on Neptune similar to Jupiter's Great Red Spot thought to represent a hole in the layers of methane in Neptune's atmosphere. The first one was observed in 1989 by NASA's Voyager probe....

  • Life Will Find a Way

    There are billions of galaxies, each with billions of stars, around each stars there may be planets which may have existed for billions of years. It seems that chance may have jumped through billions of hoops to leave us alone in the Universe. To find...

  • The Age of the Universe

    Until the twentieth century, most people – because this was taught by many religions - thought the Universe was unchanging and eternal. When the fist big telescope were built, ideas soon changed. Astronomers observed all galaxies and clusters of...

  • Binary Stars

    Our Sun is a single star, but many stars exist in binary systems consisting of two or more stars in orbit around each other (or more accurately, around their common centre of mass). There are different types of binary star – visual, spectroscopic and...

  • Galileo's Observations of the Solar System

    Galileo came after Copernicus and added to the evidence in favour of the Copernican model of the solar system. He was the first astronomer to make and use a telescope, He observed There were mountains and craters on the moon, The planet Venus had...


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