Halley's Comet or Comet Halley (officially designated 1P/Halley) is the most famous of the periodic comets, and is visible from Earth every 75 to 76 years. Many comets with long orbital periods may appear brighter and more spectacular, but Halley is the only short-period comet that is clearly visible to the naked eye, and thus, the only naked-eye comet that might appear twice in a human lifetime. During its returns to the inner solar system, it has been observed by astronomers since at least 240 BC, but it was only recognized as a periodic comet in the 18th century when its orbit was computed by English astronomer Edmond Halley, after whom it is named. Halley's Comet last appeared in the inner Solar System in 1986 and will next appear in mid-2061. During its 1986 apparition, Halley's Comet became the first to be observed in detail by spacecraft, providing the first observational data on the construction of the comet nucleus and the mechanism of tail formation. These observations supported a number of longstanding hypotheses about comet construction, particularly Fred Whipple's "dirty snowball" model, but also provided data which substantially reformed and reconfigured these ideas. Discovered by prehistoric (observation); Edmond Halley (recognition of periodicity) Orbital characteristics (Epoch 2449400.5) (February 17, 1994) Aphelion 35.1 AU (December 9, 2023) Perihelion 0.586 AU last perihelion: February 9, 1986 next perihelion: July 28, 2061 Semi-major axis 17.8 AU <b>...</b>
Song : "Adagio for strings Barber remix" by Direct To Dreams. You can get the song on Itunes here: itunes.apple.com This clip is taken from the famous movie Deep Impact from 1998. I dont take the credits for this video, im only taking the credits for editing...
International Space Station Commander Dan Burbank captured spectacular imagery of Comet Lovejoy as seen from about 240 miles above the Earth's horizon on Wednesday, Dec. 21. Today Burbank described seeing the comet two nights ago as "the most amazing thing I have ever seen in space," in an interview with WDIV-TV in Detroit. Last night he captured hundreds of still images of the comet. More images available in the International Space Station image gallery: www.nasa.gov
Watch this and other space videos at SpaceRip.com From JPL. Comets are important because they represent the leftover bits and pieces from the outer solar system formation process, which took place four and a half billion years ago. As the planets formed, the first thing you got was tiny clumps of dust in the inner solar system, and in the outer system, dust and ice. The comets are what made the cores of Jupiter, Saturn, Uranus and Neptune. But the planets are so hot that the chemistry changes completely, whereas the comets have remained frozen the entire time so that the chemistry is preserved. Comets are basically made up of a number of different regions; a dirty ice ball, relatively small and black. When it gets near the sun these ices start vaporizing, which forms a atmosphere. And then, when some of these dust particles are blown back away from the sun because of the pressure of sunlight, you form a dust tail and often a gas or ion tail. Comets and asteroids have always gotten bad press. The dinosaurs checked out 65 million years ago because of an asteroid impact. But what we don't hear about, is how important these objects are in terms of bringing the building blocks of life to the early planet. Comets almost certainly brought most of the organic material and much of the water to Earth. In a sense, we wouldn't even be here without comets and asteroids. Scientists like to put objects in boxes. Comets should look this way. Asteroids should look this way. But Mother <b>...</b>
Electric universe proponent David Talbott takes up the Comet Elenin question from a vantage point generally ignored by both the scientific mainstream and the Internet popularizers of Doomsday speculations. What is the relationship of Elenin's catastrophic demise to the larger, unsolved mystery of explosive comet disintegration? For a first look at the larger context, see "Seeking the Third Story": www.youtube.com
Mobile Klimaanlage, Monoblock-Klimagerät max. Kühlleistung: 3.2 kW Funktionen: Luftentfeuchter-Funktion Energie-Effizienzklasse: B Fassungsvermögen des Wassertanks: 1.6 l
Mobile Klimaanlage, Monoblock-Klimagerät max. Kühlleistung: 2.34 kW Funktionen: Luftentfeuchter-Funktion, elektrisch/mechanischer Luftreiniger Energie-Effizienzklasse: A Fassungsvermögen des Wassertanks: 19 l
