... There are two missions on their way to return samples to Earth and to the facility: the Genesis mission will return particles expelled from the Sun in September, and the Stardust mission will return dust from a comet's tail in January 2006. ...
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Ссылки http://www.jsc.nasa.gov/roundup/online/2004/0704_cover_p7.pdf -- 581.9 Кб -- 14.07.2004 Похожие документы
... By summer 1997 the comet had passed into the Southern Hemisphere where observers watched the comet slowly dim and the tail become shorter and shorter. ...
... I went out, and sure enough I could make out something to the left of Perseus and I could easily see it wasn't a star when using binoculars, but a comet with no tail. ...
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Ссылки http://www.princetonastronomy.org/newsletters/11_2007sidereal.pdf -- 499.3 Кб -- 06.11.2007 Похожие документы
... The comet's nucleus is much more diffuse now, and a tail is beginning to form, although it appears short and almost as wide as the comet's nucleus. ...
... It appears that a large comet must have passed very near to our planet and disrupted its movement; a part of the stones dispersed in the neck and tail of the comet smote the surface of our earth a shattering blow.? ...
... The comet then is said to have three structure elements: the nucleus, the coma, and the tails. ... the stream of material being blown off by the solar wind or being left behind as the comet moves along its orbit are the tails ...