Planet Hunting, Down to Earth Credit: European Southern Observatory Two teams of researchers are now competing to develop a device that could profoundly change our understanding of the universe…but you’d be forgiven if you mistook it for a vaguely menacing hair-restoration product. Called a “laser frequency comb,” these are special laser systems that rapidly emit pulses of light across a wide range of frequencies or colors. In a plot of the emitted light, each distinct frequency appears as a peak; collectively, all the frequencies resemble a fine-toothed comb. And by examining starlight through the teeth of a laser comb, astronomers could begin finding Earth-like extrasolar planets on the cheap using ground-based observatories rather than expensive space telescopes.
Short Words to Explain Relativity So, have a seat. Put your feet up. This may take some time. Star Map Note:You can't use fishing line. Don't even think about it. It just doesn't conduct light in the right way.[ref] You can buy optical fiber by the reel, but there are better and cheaper ways to get it*: For large star maps; a fake Christmas tree works very well! 10 NASA Inventions You Might Use Every Day In 1958, President Eisenhower signed the Space Act, officially creating the National Aeronautics and Space Administration. From the beginning, the purpose for the new branch extended beyond space ships and moon boots. The law stipulated that its research and advancements should benefit all people, and in its 50-year history, NASA has certainly fulfilled that role. Although most people today will never set foot on the moon, everyone likely comes in contact with a NASA by-product every day. Partnering with various research teams and companies, NASA continues to spawn a vast array of new technologies and products that have improved our daily lives.
The Elegant Universe: Pt 1 The Elegant Universe: Part 3 PBS Airdate: November 4, 2003 NARRATOR: Now, on NOVA, take a thrill ride into a world stranger than science fiction, where you play the game by breaking some rules, where a new view of the universe pushes you beyond the limits of your wildest imagination. Paul A.M. Dirac - Biography Paul Adrien Maurice Dirac was born on 8th August, 1902, at Bristol, England, his father being Swiss and his mother English. He was educated at the Merchant Venturer's Secondary School, Bristol, then went on to Bristol University. Here, he studied electrical engineering, obtaining the B.Sc. (Engineering) degree in 1921. He then studied mathematics for two years at Bristol University, later going on to St. John's College, Cambridge, as a research student in mathematics.
The Cost of Exploring Space: Film vs. Reality Want to stay on top of all the space news? Follow @universetoday on Twitter We all know that space exploration, while certainly not the largest expenditure of most countries, doesn’t come cheap. But neither do big-budget science fiction films, either. Special effects, sets, special effects, popular acting talent… special effects… those all come with hefty price tags that make sci-fi and fantasy films costly ventures — although bigger definitely isn’t always better. If you were to compare the price of real space exploration missions (which provide actual information) to the costs of movies about space exploration (which provide “only” entertainment) what would you expect to find? Free Interactive e-Books from NASA Reveal History, Discoveries of the Hubble & Webb Telescopes Earlier this month NASA announced that the Hubble Space Telescope found evidence of a planet forming 7.5 billion miles from its star. This astonishing discovery challenges all of our current theories about how planets develop. A few days later, Hubble captured images of two galaxies merging. Hubble has been in orbit since 1990, collecting images with one of the largest and most versatile telescopes designed for deep space.
Astronomie - MESSENGER arrive aux abords de Mercure - AstroSurf Envoyé 03-01-2008 19:42 j'ai relevé ces precisions sur le site, où il s'avère que c'est bien pour diminuer la vitesse de la sonde afin qu'elle soit capturée par Mercure...Mais ça ne répond pas tout à fait à la question : pourquoi peut-on envoyer directement une sonde en orbite de Mars et pas de Mercure ? Rôle joué par le Soleil, faible masse de Mercure ?? "5. Why take such a long and complex route to Mercury?