News tagged with earths magnetic
Maglev track could launch spacecraft into orbit
(PhysOrg.com) -- With the aim to make it easier to launch spacecraft into low Earth orbit (LEO), two researchers have turned to maglev technology to catapult a payload hundreds of miles above the Earth. While ...
Space & Earth / Space Exploration
Mar 13, 2012 |
4.4 / 5 (58) |
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Reversals of Earth's Magnetic Field Explained by Small Core Fluctuations
(PhysOrg.com) -- Based on studies of old volcanic basalt, scientists know that the Earth’s magnetic field reverses at irregular intervals, ranging from tens of thousands to millions of years. Volcanic basalt ...
Apr 23, 2009 |
4.4 / 5 (53) |
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Evidence of second fast north-south pole flip found
(PhysOrg.com) -- The Earth's magnetic poles flip around every 200,000 years or so, with north becoming south and vice versa. Normally, the process takes 4-5,000 years and it ought to be impossible for the ...
Space & Earth / Earth Sciences
Sep 06, 2010 |
4.7 / 5 (44) |
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The Earth's magnetic field remains a charged mystery
400 years of discussion and we’re still not sure what creates the Earth’s magnetic field, and thus the magnetosphere, despite the importance of the latter as the only buffer between us and deadly solar wind ...
Space & Earth / Earth Sciences
Jun 15, 2009 |
4.7 / 5 (26) |
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What keeps the Earth cooking?
What spreads the sea floors and moves the continents? What melts iron in the outer core and enables the Earth's magnetic field? Heat. Geologists have used temperature measurements from more than 20,000 boreholes ...
Jul 17, 2011 |
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Spacequakes Rumble Near Earth (w/ Video)
Researchers using NASA's fleet of five THEMIS spacecraft have discovered a form of space weather that packs the punch of an earthquake and plays a key role in sparking bright Northern Lights. They call it ...
Space & Earth / Space Exploration
Jul 28, 2010 |
4.8 / 5 (21) |
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Oldest measurement of Earth's magnetic field reveals battle between Sun and Earth for our atmosphere
Scientists at the University of Rochester have discovered that the Earth's magnetic field 3.5 billion years ago was only half as strong as it is today, and that this weakness, coupled with a strong wind of ...
Space & Earth / Earth Sciences
Mar 04, 2010 |
4.4 / 5 (22) |
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Hitachi unveils motor without 'rare earths'
Japanese high-tech firm Hitachi Wednesday unveiled an electric motor that does not use "rare earths", aiming to cut costs and reduce dependence on imports of the scarce minerals from China.
Apr 11, 2012 |
3.8 / 5 (25) |
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First measurement of magnetic field in Earth's core
(PhysOrg.com) -- A University of California, Berkeley, geophysicist has made the first-ever measurement of the strength of the magnetic field inside Earth's core, 1,800 miles underground.
Space & Earth / Earth Sciences
Dec 16, 2010 |
4.9 / 5 (19) |
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As the World Churns
(PhysOrg.com) -- "Terra firma." It's Latin for "solid Earth." Most of the time, at least from our perspective here on the ground, Earth seems to be just that: solid. Yet the Earth beneath our feet is actually ...
Space & Earth / Earth Sciences
Dec 28, 2009 |
4.4 / 5 (19) |
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Lopsided Growth at the Earth's Core
What has twisted the Earth’s core so asymmetrically out of shape? That question has been a long-standing mystery for scientists, but two new studies are shining some light on the geodynamic processes that ...
Space & Earth / Earth Sciences
Apr 21, 2010 |
4.8 / 5 (17) |
9
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Silver tells a volatile story of Earth's origin: Water was present during its birth
Tiny variations in the isotopic composition of silver in meteorites and Earth rocks are helping scientists put together a timetable of how our planet was assembled beginning 4.568 billion years ago. The new ...
Space & Earth / Earth Sciences
May 13, 2010 |
4.1 / 5 (19) |
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Ocean floor muddies China's grip on '21st-century gold'
China's monopoly over rare-earth metals could be challenged by the discovery of massive deposits of these hi-tech minerals in mud on the Pacific floor, a study on Sunday suggests.
Space & Earth / Earth Sciences
Jul 03, 2011 |
4.9 / 5 (15) |
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Lunar Reconnaissance Orbiter to Help Astronauts Survive in Infinity
(PhysOrg.com) -- Space seems exotic, forbidding, and remote, but imagine trying to survive winter without a heated shelter or warm clothing. Our ancestors developed these technologies because they needed room ...
Space & Earth / Space Exploration
Apr 17, 2009 |
4.9 / 5 (12) |
5
Ground-based lasers vie with satellites to map Earth's magnetic field
(PhysOrg.com) -- Mapping the Earth's magnetic field – to find oil, track storms or probe the planet's interior – typically requires expensive satellites.
Feb 14, 2011 |
4.8 / 5 (12) |
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