منابع مشابه
The Rosetta mission orbiter science overview: the comet phase
The international Rosetta mission was launched in 2004 and consists of the orbiter spacecraft Rosetta and the lander Philae. The aim of the mission is to map the comet 67P/Churyumov-Gerasimenko by remote sensing, and to examine its environment in situ and its evolution in the inner Solar System. Rosetta was the first spacecraft to rendezvous with and orbit a comet, accompanying it as it passes ...
متن کاملAs the Antarctic Ice Pack Recedes, a Fragile Ecosystem Hangs in the Balance
Feature Open access, freely available online H arrowing tales of starvation and endurance epitomize Antarctica's " heroic age, " when men equipped with little more than fortitude struggled against a landscape seemingly designed to thwart their intentions. A menacing sea ice fi gures prominently in these improbable survival stories. Daunting to early-20th-century explorers—trapping (and ultimate...
متن کاملCorrection: As the Antarctic Ice Pack Recedes, a Fragile Ecosystem Hangs in the Balance
Citation: (2005) Correction: As the Antarctic ice pack recedes, a fragile ecosystem hangs in the balance. PLoS Biol 3(6): e224.
متن کاملThe Stardust Mission: Returning Comet Samples to Earth
the clay formation in Nakhla or Lafayette, which occurred at <180°C [1,2). Similarly, studies of Lafayette and Nakhla here and elsewhere [7) have not revealed any obvious alteration features associated with this phase. It is believed therefore that the 0 isotopic composition of the feldspar reflects equilibration at high temperatures, rather than pervasive lower temperature exchange with water ...
متن کاملThe Castalia mission to Main Belt Comet 133P/Elst-Pizarro
We describe Castalia, a proposed mission to rendezvous with a Main Belt Comet (MBC), 133P/Elst-Pizarro. MBCs are a recently discovered population of apparently icy bodies within the main asteroid belt between Mars and Jupiter, which may represent the remnants of the population which supplied the early Earth with water. Castalia will perform the first exploration of this population by characteri...
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ژورنال
عنوان ژورنال: Nature
سال: 2003
ISSN: 0028-0836
DOI: 10.1038/421102c