41 000 years ago, the Earth's magnetic field faded and practically disappeared, leaving our planet unprotected from the bombardment of cosmic rays. Evidence for this event has been found in ocean sediment cores by a team ...
Earth Sciences
Nov 29, 2012
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Streaming into the solar system at nearly the speed of light, galactic cosmic rays (GCRs) are a high-energy mix of protons, electrons, and atomic nuclei. As they pass into reach of the outflowing solar wind, the propagation ...
Space Exploration
Nov 13, 2012
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As they near the outer reaches of the solar system, for the past several years the two Voyager spacecraft have been sending back observations that challenge scientists' views of the physics at the edge of the heliosphere, ...
Space Exploration
Oct 29, 2012
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Annual to decadal changes in the earth's magnetic field in a region that stretches from the Atlantic to the Indian Ocean have a close relationship with variations of gravity in this area. From this it can be concluded that ...
Earth Sciences
Oct 22, 2012
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While there's no official word from NASA on this, the buzz around the blogosphere is that Voyager 1 has left the Solar System. The evidence comes from this graph, above, which shows the number of particles, mainly protons, ...
Space Exploration
Oct 9, 2012
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For six weeks the rover "Curiosity" is now working on Mars. NASA also plans to send humans to Mars within the next 20 years. On the flight and during the stay on Moon or Mars the astronauts have to be protected against long ...
Space Exploration
Sep 18, 2012
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(Phys.org) -- X-ray observations have revealed something curious about the young star that illuminates McNeil's Nebula, a glowing jewel of cosmic dust in the Orion constellation: The object is a protostar rotating once a ...
Astronomy
Jul 3, 2012
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For nearly 35 years, NASA’s Voyager 1 probe has been hurtling toward the edge of the solar system, flying through the dark void on a mission unlike anything attempted before. One day, mission controllers hope, Voyager ...
Space Exploration
Jun 22, 2012
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(PhysOrg.com) -- The crushing pressures and intense temperatures in Earth's deep interior squeeze atoms and electrons so closely together that they interact very differently. With depth materials change. New experiments and ...
Condensed Matter
Dec 19, 2011
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(PhysOrg.com) -- With a unique new all-sky map, scientists at MPA have made significant progress toward measuring the magnetic field structure of the Milky Way in unprecedented detail. Specifically, the map is of a quantity ...
Astronomy
Dec 6, 2011
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