If the Moon Were Only 1 Pixel - A tediously accurate map of the solar system Mercury Venus Earth You Are Here Moon Trigonometry - Heliocentrism and Geocentrism Timeline ≈ 350 BC, Aristotle Aristotle, a pupil of Plato, becomes the tutor of Alexander the Great. Aristotle's views of the world shape science for centuries. His influence lasts until the enlightenment.
What's a Planet? There's a Test (and Pluto Flunked it) Nine years ago, the International Astronomical Union established new criteria for determining what classifies as a “planet,” a controversial move that officially (but not in spirit) stripped Pluto’s status as the solar system’s ninth planet. Left undecided was what to do about all the so-called planets being discovered outside the solar system, a number that now approaches 5,000. PHOTOS: New Pluto Pics Show Beautiful, Complex World On Tuesday, astronomer Jean-Luc Margot, with the University of California Los Angeles, unveiled what he describes as a simple “planet test.” The IAU says a “planet” is defined as a celestial body that is a) in orbit around the sun; b) has sufficient mass of self-gravity to overcome rigid body forces so that is assumes a hydrostatic equilibrium shape (in English, that means it’s nearly round); and c) has cleared the neighborhood around its orbit.
Celestia : pour télécharger la version utilisée au LIEP, proposée par T. Ferroir Celestia LIEP Download Sign in Caps lock is currently onSingle sign-on enabledor Log in with Dropbox credentials Sign up for Dropbox Planet Four Welcome to Planet Four, a citizen science project designed to help planetary scientists identify and measure features on the surface of Mars . . . the likes of which don’t exist on Earth. All of the images on this site depict the southern polar region, an area of Mars that we know little about, and the majority of which have never been seen by human eyes before! What am I looking for? We need your help to find and mark ‘fans’ and ‘blotches’ on the Martian surface.
Much ado about Pluto Space Science News home Recent discoveries of Pluto-like objects in the outer solar system have sparked debate about the nature of the tiniest "planet" Feb 17, 1999: In 1979 the Solar System became a bit mixed up. That's when Pluto, which travels in a highly elliptical orbit, temporarily moved closer to the sun than Neptune. Audio and Ringtones NASA's mission of discovery and exploration is being showcased in a custom-produced Internet music radio station that is crafted specifically to speak the language of tech-savvy young adults. Third Rock - America's Space Station offers listeners a New Rock/Indie/Alternative format. The station is being developed and operated at no cost to the government through a Space Act Agreement with Houston-based RFC Media. Third Rock also will help partner companies fill high-tech job openings in the engineering, science and IT fields. Visit Third Rock.
10th Planet Discovered Astronomers have found a new planet in the outer reaches of the solar system. + Play Audio | + Download Audio | + Historia en Espa単ol | + Join mailing list July 29, 2005: "It's definitely bigger than Pluto." So says Dr. Education NASA Education Programs and Projects A-Z list of education opportunities that NASA offers throughout the year NASA's Education Calendar The calendar features information about NASA Education opportunities for students and educators.