An Extremely Long Filament on the Sun

Yesterday, the Sun exhibited one of the longest filaments ever recorded. It may still be there today. Visible as the dark streak just below the center in the featured image, the enormous filament extended across the face of the Sun a distance even longer than the Sun's radius -- over 700,000 kilometers. A filament is actually hot gas held aloft by the Sun's magnetic field, so that viewed from the side it would appear as a raised prominence. The featured image shows the filament in light emitted by hydrogen and therefore highlights the Sun's chromosphere. Sun-following telescopes including NASA's Solar Dynamics Observatory (SDO) are tracking this unusual feature, with SDO yesterday recording a spiraling magnetic field engulfing it. Since filaments typically last only from hours to days, parts of this one may collapse or erupt at any time, either returning hot plasma back to the Sun or expelling it into the Solar System. Is the filament still there? You can check by clicking on SDO's current solar image. via NASA http://ift.tt/1E0Wes9

Making New Friends for Hubble

Thanks @JackBox ! http://ift.tt/17cUqCA NASA Watch (@NASAWatch) February 10, 2015...



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Critical NASA Science Returns to Earth aboard SpaceX Dragon Spacecraft

SpaceX's Dragon cargo spacecraft splashed down in the Pacific Ocean about 7:44 p.m. EST Tuesday 259 miles southwest of Long Beach, California, with nearly 3,700 pounds of NASA cargo, science and first-of-its-kind technology demonstration samples from the International Space Station.



February 10, 2015

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NASA Authorization Act of 2015 Passes in the House

House Passes Bipartisan NASA Bill, House Committee on Science, Space, and Technology "The NASA Authorization Act of 2015 authorizes funding consistent with the Consolidated and Further Appropriations Act of 2015. The bill continues the consistent guidance Congress has given to...



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NASA TV to Air Interactive Women in STEM Event

NASA experts, including crew members aboard the International Space Station, will answer questions about science, technology, education and mathematics (STEM) disciplines during a forum called "Women in STEM: STEM in the Global Science Community" from 12:30 to 1:30 p.m. EST on Tuesday, Feb. 17.



February 10, 2015

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Rosetta shifts from sedate circular orbits to swooping flybys

For the period of time before and after the Philae landing, Rosetta was able to orbit the comet close enough that it was in gravitationally bound orbits, circling the comet's center of gravity. As the comet's activity increases, the spacecraft has to spend most of its time farther away, performing occasional close flybys. The first of these is at 6 kilometers, on February 14.



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Hubble Sees A Smiling Lens

In the center of this image, taken with the NASA/ESA Hubble Space Telescope, is the galaxy cluster SDSS J1038+4849 — and it seems to be smiling. You can make out its two orange eyes and white button nose. In the case of this “happy face”, the two eyes are very bright galaxies and the misleading smile lines are actually arcs caused by an effect known as strong gravitational lensing. Galaxy clusters are the most massive structures in the Universe and exert such a powerful gravitational pull that they warp the spacetime around them and act as cosmic lenses which can magnify, distort and bend the light behind them. This phenomenon, crucial to many of Hubble’s discoveries, can be explained by Einstein’s theory of general relativity. In this special case of gravitational lensing, a ring — known as an Einstein Ring — is produced from this bending of light, a consequence of the exact and symmetrical alignment of the source, lens and observer and resulting in the ring-like structure we see here. Hubble has provided astronomers with the tools to probe these massive galaxies and model their lensing effects, allowing us to peer further into the early Universe than ever before. This object was studied by Hubble’s Wide Field and Planetary Camera 2 (WFPC2) and Wide Field Camera 3 (WFC3) as part of a survey of strong lenses. A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Judy Schmidt. Image Credit: NASA/ESA Caption: ESA > More information and image products via NASA http://ift.tt/1FudF5Q