The American space agency currently has numerous missions spread out across the solar system, but one of them stands out through its ambitions and complexity. The Dawn spacecraft is currently en route to the dwarf planet Ceres, and then onwards to the large asteroid Vesta. Its trajectory called for impressively-compl... |
8 June 2010
09:55 GMT |
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Engineers working on rocket propulsion systems realized a few decades ago that chemical reactions would at one point reach a stage in which advancement would do little to increase a delivery system's overall thrust. They began working on new system, which they believed could one day successfully replace oxygen- ... |
9 December 2009
09:10 GMT |
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The GOCE satellite, the first instrument to observe Earth's gravity in its smallest variations, has recently proven that it can fly drag-free in the upper atmosphere. Situated in a free-fall orbit of about 250 kilometers, which is very close to the surface, yet high enough to ensure that no air molecules slow it... |
28 May 2009
15:21 GMT |
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The Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) satellite, operated by the European Space Agency (ESA), is one of the most sensitive observatories in Earth's orbit. It carries a highly precise gravity gradiometer aboard, which allows it to detect even the smallest fluctuations in our planet&... |
7 April 2009
14:01 GMT |
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