News tagged with gravity field
Weightlessness weighs heavy on genes -- a fly's perspective
On Earth all biology is subjected to gravity. Some biological systems require gravity for correct orientation (geotropism: plants grow up, roots grow down). In the absence of gravity even human biology is affected: astronauts ...
Jan 31, 2012 |
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Students rename NASA moon probes Ebb and Flow
A pair of unmanned NASA spacecraft that are orbiting the Moon were renamed Ebb and Flow on Tuesday by a middle school class in Montana, the US space agency announced.
Space & Earth / Space Exploration
Jan 17, 2012 |
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Magnetically-levitated flies offer clues to future of life in space (w/ video)
Using powerful magnets to levitate fruit flies can provide vital clues to how biological organisms are affected by weightless conditions in space, researchers at The University of Nottingham say.
Jan 04, 2012 |
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NASA's GRAIL-A spacecraft 24 hours away from Moon
(PhysOrg.com) -- NASA's Gravity Recovery And Interior Laboratory (GRAIL)-A spacecraft is within 24 hours of its insertion burn that will place it into lunar orbit. At the time the spacecraft crossed the milestone ...
Space & Earth / Space Exploration
Dec 31, 2011 |
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Twin probes to circle moon to study gravity field
The moon has come a long way since Galileo first peered at it through a telescope. Unmanned probes have circled around it and landed on its surface. Twelve American astronauts have walked on it. And lunar ...
Space & Earth / Space Exploration
Dec 26, 2011 |
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Unique geologic insights from 'non-unique' gravity and magnetic interpretation
(PhysOrg.com) -- In many fields of applied science, such as geology, there are often tensions and disagreements between scientists who specialize in analyses of problems using mathematical models to describe sets of collected ...
Space & Earth / Earth Sciences
Dec 02, 2011 |
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Texas drought visible in new national groundwater maps
(PhysOrg.com) -- The record-breaking drought in Texas that has fueled wildfires, decimated crops and forced cattle sales has also reduced levels of groundwater in much of the state to the lowest levels seen ...
Space & Earth / Earth Sciences
Nov 30, 2011 |
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Twin NASA craft launched to study insides of moon
A pair of spacecraft rocketed toward the moon Saturday on the first mission dedicated to measuring lunar gravity and determining what's inside Earth's orbiting companion - all the way down to the core.
Space & Earth / Space Exploration
Sep 10, 2011 |
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Storms may stall launch of twin spacecraft to moon
(AP) -- NASA may have to wait a few days before launching a set of twins to the moon.
Space & Earth / Space Exploration
Sep 07, 2011 |
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NASA invites 150 Twitter followers to lunar launch
(PhysOrg.com) -- NASA has invited 150 followers of the agency's Twitter accounts to a two-day launch Tweetup Sept. 7-8. The Tweetup is expected to culminate in the launch of the twin moon-bound GRAIL spacecraft ...
Space & Earth / Space Exploration
Sep 02, 2011 |
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GRAIL moon mission in final preparations for September launch
NASA's Gravity Recovery And Interior Laboratory (GRAIL) mission to study the moon is in final launch preparations for a scheduled Sept. 8 launch from Cape Canaveral Air Force Station in Florida.
Space & Earth / Space Exploration
Aug 26, 2011 |
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Research confirms it's a small world, after all
(PhysOrg.com) -- A NASA-led research team has confirmed what Walt Disney told us all along: Earth really is a small world, after all.
Space & Earth / Earth Sciences
Aug 16, 2011 |
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Dawn beams back asteroid science data
(PhysOrg.com) -- The Dawn spacecraft has completed a graceful spiral into the first of four planned science orbits during the spacecraft's yearlong visit to Vesta. The spacecraft started taking detailed observations ...
Space & Earth / Space Exploration
Aug 12, 2011 |
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Earth is getting fatter
Like many of its inhabitants, the Earth is getting thicker around the middle -- that's what a new study out this week says. The increased bulge is due to the melting of the Greenland and Antarctic ice sheets.
Space & Earth / Earth Sciences
Jul 28, 2011 |
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The seasonal potato: Recalculation of the Potsdam geoid shows time-dependent variation of gravity
The "Potsdam Gravity potato", as this representation of terrestrial gravity has become known, can for the first time display gravity variations that change with time. The seasonal fluctuations of the water ...
Space & Earth / Earth Sciences
Jun 30, 2011 |
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Gravitational field
A gravitational field is a model used within physics to explain how gravity exists in the universe. In its original concept, gravity was a force between point masses. Following Newton, Laplace attempted to model gravity as some kind of radiation field or fluid, and since the 19th century explanations for gravity have usually been sought in terms of a field model, rather than a point attraction.
In a field model, rather than two particles attracting each other, the particles distort spacetime via their mass, and this distortion is what is perceived subjectively as a "force". In fact there is no force in such a model, rather matter is simply responding to the curvature of spacetime itself.
For more information about Gravitational field, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
