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Originally posted by Phage
reply to post by pitchdragon
this is just incredible we never see this before... this is the first time since The Solar Dynamics Observatory (SDO) was launched
Not exactly. Unless I misunderstand.
SDO was launched in February of 2010.
However, according to NASA scientists, the feature is actually a little-understood, but frequently observed, type of solar activity called a "prominence," and the way it is situated beneath another solar feature gives it its otherworldy appearance.
C. Alex Young, a solar astrophysicist at NASA's Goddard Space Flight Center who runs a website called The Sun Today, explained that the prominence is situated below a tunnel-shape feature called a filament channel. "When you look at it from the edge of the sun, what you actually see is a spherical object. You're actually looking down the tunnel. And this tunnel sits up top of the filament," Young explained at The Sun Today. He added that the development of these structures is quite common. But why is the prominence dark? Gurman explained that all the light in the SDO images is the same color — a specific wavelength that is emitted by iron atoms that have been ionized 13 times, known as Fe XIV. The dark filament seen in the images (the refueling UFO's "tether," according to YouTube users) is a part of the prominence that happens to absorb light of this color, making it appear dark. "The absorption is typically seen in lines such as Fe XIV only in the thinnest, densest parts of the prominence, which is here seen edge-on as it rotates over the solar limb," he said
The thread extending from the lower left edge of the sun in the video is known as a "prominence," a feature containing cooler, denser plasma than the surrounding 3.5-million-degree Fahrenheit corona, said Joseph Gurman, project scientist in the Solar Physics Laboratory at NASA Goddard. It isn't yet known exactly how prominences develop, but these dense plasma loops can extend from the sun's surface thousands of miles into space. "When prominences are that extended in height above the limb [edge of the sun], it's usually a sign that they're about to erupt, as this one did," Gurman told Life's Little Mysteries.
Originally posted by pitchdragon
hello i was looking video on YouTube and i find this one
i was surprise and i could not figure it out, what is this giant black sphere next to the sun and this filament between them, if some of you have an idea ?
most of time I'm not impressed and most of time there is a good explanation but this time I'm scratching my head !
i search for it in ats i did not find any thread talking about !
he mysterious origins of the stellar version of vampires — stars that apparently drain life away from other stars to look young — may just have been solved, scientists revealed. Blue stragglers are oddball stars that seem to lag or straggle in age behind the ancient neighbors with which they formed. Instead, they appear inexplicably hotter, and thus younger and bluer. Astronomers have debated for decades as to why blue stragglers don't show their age. It's been hypothesized that they must have come across extra hydrogen fuel that helped them burn hotter, but it was uncertain whether they did so by merging with other stars, colliding with victims or stealing hydrogen from companions. [ Top 10 Star Mysteries ] "People have been trying to explain the origin of blue stragglers since their discovery in 1953," said study lead author Aaron Geller, an astronomer at Northwestern University. Now researchers have evidence that blue stragglers are indeed cannibals that rip fuel off their neighbors.
Blue straggler origin debate However, although their findings account for most of the blue stragglers in NCG 188, the researchers do note a few might have been created by other methods. For instance, two of the blue stragglers in binary systems likely had other kinds of encounters, and potentially collisions, with other stars at some point, Geller said. In addition, five of the 21 blue stragglers analyzed apparently did not have companions, and "we do not have enough data on the blue stragglers that currently appear to be single to say where they come from," he added. "It is likely that multiple formation mechanisms are response for producing the full blue straggler population in the cluster," Geller said. The researchers will now use the Hubble Space Telescope to search for ultraviolet light from these hidden companions, to confirm if they are indeed white dwarfs.