Comet 'brighter than the moon' will fly-by the Earth in 2013 By Eddie Wrenn Published: 08:45 GMT, 27 September 2012 | Updated: 13:28 GMT, 27 September 2012 They are one of the most spectacular views a human could hope to see - and next year a comet which could outshine the moon is due to fly by the Earth. Comet ISON is visiting the inner solar system and is set to put on spectacular views for the Northern Hemisphere across November and December as it heads towards the sun.
Severe nuclear reactor accidents likely every 10 to 20 years, European study suggests Western Europe has the worldwide highest risk of radioactive contamination caused by major reactor accidents. Catastrophic nuclear accidents such as the core meltdowns in Chernobyl and Fukushima are more likely to happen than previously assumed. Based on the operating hours of all civil nuclear reactors and the number of nuclear meltdowns that have occurred, scientists at the Max Planck Institute for Chemistry in Mainz have calculated that such events may occur once every 10 to 20 years (based on the current number of reactors) -- some 200 times more often than estimated in the past. The researchers also determined that, in the event of such a major accident, half of the radioactive caesium-137 would be spread over an area of more than 1,000 kilometres away from the nuclear reactor.
Big Spin" Model of Gravity by Sergey Ivanenko Posted: Wednesday, March 12, 2003 Last updated: Saturday, February 25, 2006 PACS 04.50.+h – Alternative theories of gravity (formerly "Inertial Theory of Gravity ", modified) This is an attempt to explain fundamental reasons for gravity, going beyond its relativistic definition as spacetime curvature. The “Big Spin” model suggests that gravity is a result of rotation of the Universe’s hypersphere (not a Gödel's rotation). It assumes that space possesses elastic properties and Newton’s law of inertia holds true for higher dimension(s).
Fractions Decimals Percentages Topics: Starter | Decimals | Fractions | Mental Methods | Percentages How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.Click here to enter your comments. If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score!
Vi Hart: Math Doodling Remember that video about doodling dragons and fractals and stuff? I finally finished part 2! Here is a magnet link so you can dowload it via torrent. Here it is on YouTube: You can tell I worked on it for a long time over many interruptions (travelling and other stuff), because in order to keep myself from hating what was supposed to be a quick easy part 2, I had to amuse myself with snakes. 'Life' gene missing on volcanoes 11 June 2012Last updated at 19:50 ET A gene thought previously to be present in all life on earth is missing in microbes in volcanoes A gene thought previously to be present in all life on earth is missing in microbes living in boiling acid near the summits of volcanoes.
Mysterious Extragalactic Explosions Baffle Astronomers Powerful and puzzling radio blasts in other galaxies constantly explode across the night sky, a new study suggests. A team of international astronomers has detected four explosive events, known as fast radio bursts (FRBs), above the plane of our Milky Way Galaxy. Lasting only a few thousandths of a second, these sources send powerful signals across the universe, traveling billions of light-years through space. "These bursts gave off more energy in a millisecond than the sun does in 300,000 years," said principal investigator Dan Thornton of the University of Manchester in England. [Slideshow: History & Structure of the Universe Explained] Mysterious origins
Lines of primes Prime numbers have fascinated mathematicians for centuries. A prime number has exactly 2 factors - one and itself. The only even prime is 2, the rest are all odd. The primes less than 100 are as follows: There doesn't appear to be a pattern in the distribution of primes.