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) |
37
|
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) |
24
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) |
29
|
Mercury's magnetic field -- nipped in the bud
(PhysOrg.com) -- Mercury, the smallest of the eight planets with a diameter of 4900 kilometres and the closest to the Sun, looks more like the Moon than the Earth from the outside. It is the only rocky planet ...
Space & Earth / Space Exploration
Dec 23, 2011 |
5 / 5 (3) |
27
|
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) |
2
|
Meteorite holds clues to organic chemistry of the early Earth: study
(PhysOrg.com) -- Carbonaceous chondrites are a type of organic-rich meteorite that contain samples of the materials that took part in the creation of our planets nearly 4.6 billion years ago, including materials ...
Space & Earth / Space Exploration
Jun 09, 2011 |
4.7 / 5 (6) |
1
|
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) |
5
|
Space weather: Explosions on Venus
In the grand scheme of the solar system, Venus and Earth are almost the same distance from the sun. Yet the planets differ dramatically: Venus is some 100 times hotter than Earth and its days more than 200 ...
Space & Earth / Space Exploration
Mar 05, 2012 |
4 / 5 (9) |
8
|
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) |
3
|
Clean energy could lead to scarce materials
As the world moves toward greater use of low-carbon and zero-carbon energy sources, a possible bottleneck looms, according to a new MIT study: the supply of certain metals needed for key clean-energy technologies.
Apr 09, 2012 |
3.9 / 5 (8) |
25
|
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) |
18
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) |
10
|
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) |
0
|
Uranus auroras glimpsed from Earth
(Phys.org) -- For the first time, scientists have captured images of auroras above the giant ice planet Uranus, finding further evidence of just how peculiar a world that distant planet is. Detected by means ...
Space & Earth / Space Exploration
Apr 13, 2012 |
4 / 5 (6) |
7
|
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) |
21
