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Latest STEREO Stories

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2011-06-11 09:30:00

The far side unveiled! This is the first complete image of the solar far side, the half of the sun invisible from Earth. Captured on June 1, 2011, the composite image was assembled from NASA's two Solar TErrestrial RElations Observatory (STEREO) spacecraft. STEREO-Ahead's data is shown on the left half of image and STEREO-Behind's data on the right. The STEREO spacecraft reached opposition (180° separation) on February 6 but part of the sun was inaccessible to their combined view until...

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2011-05-26 09:44:59

MESSENGER's Mercury Laser Altimeter (MLA) in its first 2 months of operation has already built up a grid of ground tracks that span most of Mercury's surface north of the equator (Figure 1). These data will provide a very good measure of the shape of the planet's northern hemisphere. The shape of a planet carries a record of all of the interior dynamical and geological processes that have modified the surface. Signals from MLA's laser reflected from the surface can be recovered whenever the...

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2011-04-19 08:30:32

The largest disturbances to the Earth's geomagnetic environment occur when it is buffeted by solar material hurled in our direction by explosive changes in the Sun's atmosphere. These Coronal Mass Ejections or CMEs contain approximately a billion tons of ionized gas or plasma and can have a dramatic and damaging impact on everything from satellites to power grids. Now a team of scientists have used two spacecraft to study these events in unprecedented detail. Graduate student Anthony Williams...

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2011-04-19 06:05:00

Researchers have discovered 122 new eclipsing binary stars and observed hundreds more variable stars in an innovative survey using NASA's two STEREO solar satellites. The survey has been carried out by team from the Open University, University of Central Lancashire and the STFC Rutherford Appleton Laboratory. Dr Danielle Bewsher will present highlights at the RAS National Astronomy Meeting in Llandudno, Wales on Tuesday 19th April. STEREO was launched in 2006 to study the Sun in 3D and...

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2011-04-05 08:16:35

On April 4th, MESSENGER began its yearlong science campaign to understand the innermost planet. The spacecraft will fly around Mercury 700 times over the next 12 months, and its instruments will perform the first complete reconnaissance of the cratered planet's geochemistry, geophysics, geological history, atmosphere, magnetosphere, and plasma environment. "MESSENGER's orbital commissioning phase, which we just completed, demonstrated that the spacecraft and payload are all operating...

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2011-02-16 13:20:00

Observers say that the Sun has unleashed its strongest flare in four years. The eruption was an X-flare, which is the strongest type of flare that can affect communications on Earth. NASA's Solar Dynamics Observatory (SDO) spacecraft recorded an intense flash of extreme ultraviolet radiation emanating from a sunspot. The British Geological Survey (BGS) issued a geomagnetic storm warning and said that observers might be able to see auroras from the northern U.K. The flare was recorded on...

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2011-02-06 14:15:00

Dr. Tony Phillips, NASA's Heliophysics News Team On Feb. 6th, NASA's twin STEREO probes moved into position on opposite sides of the sun, and they are now beaming back uninterrupted images of the entire star"”front and back. "For the first time ever, we can watch solar activity in its full 3-dimensional glory," says Angelos Vourlidas, a member of the STEREO science team at the Naval Research Lab in Washington, DC. "This is a big moment in solar physics," says Vourlidas. "STEREO has...

2011-02-04 11:10:00

WASHINGTON, Feb. 4, 2011 /PRNewswire-USNewswire/ -- NASA will score big on super SUN-day at 11 a.m. EST, Sunday, Feb. 6, with the release online of the first complete view of the sun's entire surface and atmosphere. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) Seeing the whole sun front and back simultaneously will enable significant advances in space weather forecasting for Earth, and improve planning for future robotic or crewed spacecraft missions throughout the solar...

2010-12-13 12:00:00

PALO ALTO, Calif., Dec. 13, 2010 /PRNewswire/ -- A serendipitous alignment of high-powered spaceborne solar instruments-designed and built by Lockheed Martin (NYSE: LMT)-has finally provided the data allowing scientists to uncover the physical mechanism behind so-called "sympathetic flares" on the Sun. For over 75 years, solar physicists have been observing near-synchronous explosions in the solar atmosphere, and have wondered whether they were somehow related, but hard evidence for...

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2010-12-07 14:25:00

Our Sun can be a menace when it sends out powerful solar blasts of radiation towards the Earth. Astronomers keenly watch the Sun to learn more about what powers these solar eruptions, in hopes of being able to predict them. New research shows that one-third of the Sun's blasts are "sneak attacks" that may occur without warning. "If space weather forecasters rely on some of the traditional danger signs, they'll miss a significant fraction of solar eruptions," said Suli Ma of the...


Word of the Day
baudekin
  • A rich embroidered or brocaded silk fabric woven originally with a warp of gold thread.
'Baudekin' seems to be an alternative form of 'baldachin,' from the Italian 'Baldacco,' Baghdad, the city where the material was made.
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