Kuiper Belt world measured in star pass 16 June 2010Last updated at 19:46 By Katia Moskvitch Science reporter, BBC News The Kuiper Belt is home to several dwarf planets, one of which is Pluto Astronomers say they have observed, for the first time, a distant icy world orbiting beyond Neptune as it passed briefly in front of a bright star. This "stellar occultation" occurs when a planetary body hides a star as it moves across the sky.
Heliocentric and Geocentric Motion At the left the applet is simulating the Copernican heliocentric model of the solar system, whereas the simulation at the right is showing the motion from the geocentric point of view, propagated by Tycho Brahe (Tychonic model). Both models are equivalent, and both of them decscribe the phases of the Planets correctly. The Ptolemaic Model The phases of the planets as seen by Ptolemy's model are not correct. Diagrams: geocentric longitude and latitude Diagrams: geocentric longitude and latitude
Mars may not be lifeless, say scientists 6 September 2010Last updated at 13:18 By Katia Moskvitch Science reporter, BBC News The Vikings probed the Martian soil back in 1976 Carbon-rich organic molecules, which serve as the building blocks of life, may be present on Mars after all, say scientists - challenging a widely-held notion of the Red Planet as barren. When Nasa's two Viking landers picked up and examined samples of Martian soil in 1976, scientists found no evidence for carbon-rich molecules or biology. But after the Phoenix Mars Lander discovered the chlorine-containing chemical perchlorate in the planet's "arctic" region in 2008, scientists decided to re-visit the issue. Continue reading the main story
Nice And Simple Toolbar For Your Website With CSS3 And jQuery During these months I’ve learned an important lesson as blogger. If you want to start an activity on the web with a blog, magazine or a general website, you must plan a clever action on the Social Networking and Bookmarking websites. Often it’s an hard thing to interface a website with the many available social services, but recently there are some famous blogs, like Abduzeedo and Mashable, that are using a fixed toolbar on the bottom of the page with useful button for the sharing. There are services, like Wibiya, that allow to add a toolbar in a few steps, but why don’t you create a really custom panel using your CSS and jQuery skills? In this tutorial we’ll learn how to build a nice toolbar for our website using some CSS3 properties and basic jQuery techniques. The Idea Behind
Mystery Object Defies Astronomical Classification A mysterious object discovered near a brown dwarf doesn’t fit into any known astronomical category. The newly discovered mystery companion forms a binary system with the brown dwarf, located 460 light-years away in the Taurus star-forming system. The object is too light to be another brown dwarf, but it’s too young to have formed by accretion, the way a typical planet does. “Although this small companion appears to have a mass that is comparable to the mass of planets around stars, we don’t think it formed like a planet,” said astronomer Kevin Luhman of Penn State University, co-author of the study April 5 in The Astrophysical Journal.
Nice Web Type – How to use CSS @font-face Code up top for quick reference, details down below—we’ll prepare typefaces for use on the web, go through @font-face CSS line-by-line, and get the experts’ take on browser support. Updated May 2010 with new syntax from Paul Irish. The CSS: Electric Icarus: NASA Designs a One-Man Stealth Plane A super-quiet, hover-capable aircraft design, NASA's experimental one-man Puffin could show just how much electric propulsion can transform our ideas of flight. It looks like nothing less than a flying suit or a jet pack with a cockpit. On the ground, the Puffin is designed to stand on its tail, which splits into four legs to help serve as landing gear. As a pilot prepares to take off, flaps on the wings would tilt to deflect air from the 2.3-meter-wide propeller rotors upward, keeping the plane on the ground until it was ready to fly and preventing errant gusts from tipping it over.