{ "count": 26, "next": null, "previous": null, "results": [ { "id": 5210, "url": "https://svs.gsfc.nasa.gov/5210/", "result_type": "Visualization", "release_date": "2024-02-16T00:00:00-05:00", "title": "The Active Christmas Eve 2023 Ultraviolet Sun", "description": "Solar Dynamics Observatory (SDO) operates in a geosynchronous orbit around Earth to obtain a continuous view of the Sun. The particular instrument in this visualization records imagery in the ultraviolet portion of the spectrum at wavelengths normally absorbed by Earth's atmosphere - so we need to observe them from space.Solar Dynamics Observatory (SDO) observes a very active hemisphere of the Sun on Christmas Eve 2023. No significant flares - just fifteen hours of small eruptions, bright coronal loops, dark filaments hovering above photosphere, and other small-scale phenomena in the life of a star evolving towards the peak of it's activity cycle.The point-spread function correction (PSF) has been applied to all this imagery. || ", "hits": 45 }, { "id": 5165, "url": "https://svs.gsfc.nasa.gov/5165/", "result_type": "Visualization", "release_date": "2024-01-05T00:00:00-05:00", "title": "STEREO - The Second Time Around...", "description": "In mid-August 2023, the still-operational STEREO-A (STEREO-B went offline in October 2014) passed Earth for the first time since its launch 17 years ago. See also STEREO-A Returns by Earth.While STEREO-B is no longer available, it is possible to construct stereo imagery of the Sun using STEREO-A with Solar Dynamics Observatory (SDO). Here we present a series of images for corresponding filters between the two missions which can be used for stereo viewing.Color (SDO color table) Left/Right Image PairsIn this section, we present frame-synchronized left eye (STEREO-A) and right eye (SDO) for the specified ultraviolet filter. They are provided as separate movie and frame-sets to maximize flexibility for the target viewing technology. Time stamps are provided as separate image files for compositing if desired. If you match frame numbers for the image sets for a specific filter, you will have images closest in time for apropriate left/right eye pairing.171 Angstrom filter || ", "hits": 58 }, { "id": 5102, "url": "https://svs.gsfc.nasa.gov/5102/", "result_type": "Visualization", "release_date": "2023-05-11T12:00:00-04:00", "title": "When Coronal Holes are Smiling.... - October 26, 2022", "description": "Solar Dynamics Observatory (SDO) operates in a geosynchronous orbit around Earth to obtain a continuous view of the Sun. The particular instrument in this visualization records imagery in the ultraviolet portion of the spectrum at wavelengths normally absorbed by Earth's atmosphere - so we need to observe them from space.In another example of pareidolia (Wikipedia) we have what appears to be a smiling face in the SDO/AIA 193 Angstrom filters formed by the arrangement of the darker coronal holes. Coronal holes form at the footpoints of open magnetic field lines which form a 'fast track' for the outflowing solar wind. These 'open' field lines do not connect back to the Sun but instead reach out to the heliopause and interstellar medium. The fast solar wind has an average speed of about 750 kilometers per second, compared to the slow solar wind with speeds from 300 to 500 kilometers per second.For comparison, we include the same time frame from the AIA 171 Angstrom filter where the 'face' is much less pronounced. || ", "hits": 104 }, { "id": 4854, "url": "https://svs.gsfc.nasa.gov/4854/", "result_type": "Visualization", "release_date": "2020-09-15T10:00:00-04:00", "title": "Coronal Holes at Solar Minimum and Solar Maximum", "description": "A sample of solar coronal holes around the time of the maximum of sunspot activity (April 2014). Note the polar regions are devoid of coronal holes but a large hole appears in the southern hemisphere. || CoronalHoleMax_AIA193_00150_print.jpg (1024x1024) [173.1 KB] || CoronalHoleMax_AIA193_00150_searchweb.png (320x180) [89.6 KB] || CoronalHoleMax_AIA193_00150_thm.png (80x40) [7.4 KB] || CoronalHoleMax_AIA193_2048p30.mp4 (2048x2048) [61.7 MB] || CoronalHoleMax_AIA193_2048p30.webm (2048x2048) [2.9 MB] || AIA193-Time (4096x4096) [64.0 KB] || AIA193-Frames (4096x4096) [64.0 KB] || CoronalHoleMax_Timestamp (600x100) [64.0 KB] || ", "hits": 173 }, { "id": 4763, "url": "https://svs.gsfc.nasa.gov/4763/", "result_type": "Visualization", "release_date": "2019-11-11T16:30:00-05:00", "title": "Mercury Transit, 2019 (SDO 4K imagery)", "description": "Mercury transit visible through the 171 angstrom filter on SDO. || AIA171_00025_print.jpg (1024x1024) [108.7 KB] || AIA171_00025_searchweb.png (320x180) [65.6 KB] || AIA171_00025_thm.png (80x40) [5.2 KB] || AIA171_2048p30.mp4 (2048x2048) [19.2 MB] || AIA171_1024p30.mp4 (1024x1024) [3.7 MB] || AIA171-Frames (4096x4096) [0 Item(s)] || AIA171-Time (4096x4096) [0 Item(s)] || AIA171_4096p30_h265.mp4 (4096x4096) [13.6 MB] || AIA171_4096p30_h265.webm (4096x4096) [2.7 MB] || ", "hits": 64 }, { "id": 4166, "url": "https://svs.gsfc.nasa.gov/4166/", "result_type": "Visualization", "release_date": "2015-02-11T00:00:00-05:00", "title": "March 2014: Erupting Solar Prominence", "description": "A solar filament, in the upper left quadrant of the image, erupts from the Sun (about time stamp 2014 March 29 01:54:00 UTC).There is a gap of 40 minutes in the data coverage, from 03:00 - 03:40 UT. || ", "hits": 32 }, { "id": 11739, "url": "https://svs.gsfc.nasa.gov/11739/", "result_type": "Produced Video", "release_date": "2015-01-20T11:00:00-05:00", "title": "Telescope on NASA's SDO Collects Its 100 Millionth Image", "description": "100 million images of the sun: The Advanced Imaging Assembly on NASA's Solar Dynamics Observatory captured its 100 millionth image of the sun on Jan. 19, 2015. The image shows the glow in the solar atmosphere of gases at about 1.5 million Kelvin. Credit: NASA/SDO/AIA/LMSAL || SDO_AIA_193_100Millionth_print.jpg (1024x1024) [168.6 KB] || SDO_AIA_193_100Millionth.jpeg (4096x4096) [2.4 MB] || SDO_AIA_193_100Millionth_web.jpg (320x320) [27.3 KB] || SDO_AIA_193_100Millionth_searchweb.png (320x180) [95.6 KB] || SDO_AIA_193_100Millionth_thm.png (80x40) [10.2 KB] || ", "hits": 112 }, { "id": 4172, "url": "https://svs.gsfc.nasa.gov/4172/", "result_type": "Visualization", "release_date": "2014-07-23T00:00:00-04:00", "title": "As Seen by SDO: The Carrington-Class CME of 2012", "description": "While SDO did not have a direct view of the region which launched the large coronal mass ejection (CME) of July 23, 2012, it still managed to catch a glimpse of the solar plasma as it launched into space. The eruption becomes visible at timestamp 02:14:24 UTC in the lower right side of the movies below. || ", "hits": 33 }, { "id": 4151, "url": "https://svs.gsfc.nasa.gov/4151/", "result_type": "Visualization", "release_date": "2014-05-16T00:00:00-04:00", "title": "Looking Back: The Record Flare for Solar Cycle 24", "description": "On August 9, 2011 at 3:48 a.m. EDT, the sun emitted an Earth-directed X6.9 flare, as measured by the NOAA GOES satellite. These gigantic bursts of radiation cannot pass through Earth's atmosphere to harm humans on the ground, however they can disrupt the atmosphere and disrupt GPS and communications signals. In this case, it appears the flare is strong enough to potentially cause some radio communication blackouts. It also produced increased solar energetic proton radiation — enough to affect humans in space if they do not protect themselves.As of March 2014, this flare is the largest of solar cycle 24.Here are the raw images used in creating the components in Sun Unleashes X6.9 Class Flare on August 9, 2011 || ", "hits": 36 }, { "id": 11460, "url": "https://svs.gsfc.nasa.gov/11460/", "result_type": "Produced Video", "release_date": "2014-02-11T12:00:00-05:00", "title": "SDO: Year 4", "description": "The sun is always changing and NASA's Solar Dynamics Observatory is always watching. Launched on Feb. 11, 2010, SDO keeps a 24-hour eye on the entire disk of the sun, with a prime view of the graceful dance of solar material coursing through the sun's atmosphere, the corona. SDO's fourth year in orbit was no exception: NASA is releasing a movie of some of SDO's best sightings of the year, including massive solar explosions and giant sunspot shows. SDO captures images of the sun in 10 different wavelengths, each of which helps highlight a different temperature of solar material. Different temperatures can, in turn, show specific structures on the sun such as solar flares, which are giant explosions of light and x-rays, or coronal loops, which are streams of solar material traveling up and down looping magnetic field lines. The movie shows examples of both, as well as what's called prominence eruptions, when masses of solar material leap off the sun. The movie also shows a sunspot group on the solar surface. This sunspot, a magnetically strong and complex region appearing in mid-January 2014, was one of the largest in nine years. Scientists study these images to better understand the complex electromagnetic system causing the constant movement on the sun, which can ultimately have an effect closer to Earth, too: Flares and another type of solar explosion called coronal mass ejections can sometimes disrupt technology in space. Moreover, studying our closest star is one way of learning about other stars in the galaxy. NASA's Goddard Space Flight Center in Greenbelt, Md. built, operates, and manages the SDO spacecraft for NASA's Science Mission Directorate in Washington, D.C.SDO: Year One here.SDO: Year 2 here.SDO: Year 3 here.Information about the individual clips used in this video is here. || ", "hits": 61 }, { "id": 4128, "url": "https://svs.gsfc.nasa.gov/4128/", "result_type": "Visualization", "release_date": "2013-12-24T00:00:00-05:00", "title": "Solar Dynamics Observatory - Argo view - Slices of SDO", "description": "Argos (or Argus Panoptes) was the 100-eyed giant in Greek mythology (wikipedia).While the Solar Dynamics Observatory (SDO) has significantly less than 100 eyes, (see \"SDO Jewelbox: The Many Eyes of SDO\"), seeing connections in the solar atmosphere through the many filters of SDO presents a number of interesting challenges. This visualization experiment illustrates a mechanism for highlighting these connections. This visualization is a variation of the original Solar Dynamics Observatory - Argo view. In this case, the different wavelength filters are presented in three sets around the Sun at full 4Kx4K resolution. This enables monitoring of changes in time over all wavelengths at any location around the limb of the Sun. The wavelengths presented are: 617.3nm optical light from SDO/HMI. From SDO/AIA we have 170nm (pink), then 160nm (green), 33.5nm (blue), 30.4nm (orange), 21.1nm (violet), 19.3nm (bronze), 17.1nm (gold), 13.1nm (aqua) and 9.4nm (green).We've locked the camera to rotate the view of the Sun so each wedge-shaped wavelength filter passes over a region of the Sun. As the features pass from one wavelength to the next, we can see dramatic differences in solar structures that appear in different wavelengths.Filaments extending off the limb of the Sun which are bright in 30.4 nanometers, appear dark in many other wavelengths.Sunspots which appear dark in optical wavelengths, are festooned with glowing ribbons in ultraviolet wavelengths.small flares, invisible in optical wavelengths, are bright ribbons in ultraviolet wavelengths.if we compare the visible light limb of the Sun with the 170 nanometer filter on the left, with the visible light limb and the 9.4 nanometer filter on the right, we see that the 'edge' is at different heights. This effect is due to the different amounts of absorption, and emission, of the solar atmosphere in ultraviolet light.in far ultraviolet light, the photosphere is dark since the black-body spectrum at a temperature of 5700 Kelvin emits very little light in this wavelength. || ", "hits": 62 }, { "id": 4117, "url": "https://svs.gsfc.nasa.gov/4117/", "result_type": "Visualization", "release_date": "2013-12-17T10:00:00-05:00", "title": "Solar Dynamics Observatory - Argo view", "description": "Argos (or Argus Panoptes) was the 100-eyed giant in Greek mythology (wikipedia).While the Solar Dynamics Observatory (SDO) has significantly less than 100 eyes, (see \"SDO Jewelbox: The Many Eyes of SDO\"), seeing connections in the solar atmosphere through the many filters of SDO presents a number of interesting challenges. This visualization experiment illustrates a mechanism for highlighting these connections.The wavelengths presented are: 617.3nm optical light from SDO/HMI. From SDO/AIA we have 170nm (pink), then 160nm (green), 33.5nm (blue), 30.4nm (orange), 21.1nm (violet), 19.3nm (bronze), 17.1nm (gold), 13.1nm (aqua) and 9.4nm (green).We've locked the camera to rotate the view of the Sun so each wedge-shaped wavelength filter passes over a region of the Sun. As the features pass from one wavelength to the next, we can see dramatic differences in solar structures that appear in different wavelengths.Filaments extending off the limb of the Sun which are bright in 30.4 nanometers, appear dark in many other wavelengths.Sunspots which appear dark in optical wavelengths, are festooned with glowing ribbons in ultraviolet wavelengths.Small flares, invisible in optical wavelengths, are bright ribbons in ultraviolet wavelengths.If we compare the visible light limb of the Sun with the 170 nanometer filter on the left, with the visible light limb and the 9.4 nanometer filter on the right, we see that the 'edge' is at different heights. This effect is due to the different amounts of absorption, and emission, of the solar atmosphere in ultraviolet light.In far ultraviolet light, the photosphere is dark since the black-body spectrum at a temperature of 5700 Kelvin emits very little light in this wavelength. || ", "hits": 200 }, { "id": 11379, "url": "https://svs.gsfc.nasa.gov/11379/", "result_type": "Produced Video", "release_date": "2013-10-24T10:00:00-04:00", "title": "Filament Eruption Creates 'Canyon of Fire' on the Sun", "description": "A magnetic filament of solar material erupted on the sun in late September, breaking the quiet conditions in a spectacular fashion. The 200,000 mile long filament ripped through the sun's atmosphere, the corona, leaving behind what looks like a canyon of fire. The glowing canyon traces the channel where magnetic fields held the filament aloft before the explosion. Visualizers at NASA's Goddard Space Flight Center in Greenbelt, Md. combined two days of satellite data to create a short movie of this gigantic event on the sun.In reality, the sun is not made of fire, but of something called plasma: particles so hot that their electrons have boiled off, creating a charged gas that is interwoven with magnetic fields. These images were captured on Sept. 29-30, 2013, by NASA's Solar Dynamics Observatory, or SDO, which constantly observes the sun in a variety of wavelengths. Different wavelengths help capture different aspect of events in the corona. The red images shown in the movie help highlight plasma at temperatures of 90,000° F and are good for observing filaments as they form and erupt. The yellow images, showing temperatures at 1,000,000° F, are useful for observing material coursing along the sun's magnetic field lines, seen in the movie as an arcade of loops across the area of the eruption. The browner images at the beginning of the movie show material at temperatures of 1,800,000° F, and it is here where the canyon of fire imagery is most obvious. By comparing this with the other colors, one sees that the two swirling ribbons moving farther away from each other are, in fact, the footprints of the giant magnetic field loops, which are growing and expanding as the filament pulls them upward. || ", "hits": 123 }, { "id": 4101, "url": "https://svs.gsfc.nasa.gov/4101/", "result_type": "Visualization", "release_date": "2013-09-20T10:00:00-04:00", "title": "August 2013: SDO Observes Large Coronal Hole", "description": "On the Sun, coronal holes represent regions where the solar magnetic field does not connect back to the Sun. In these cases, the magnetic field guides the charged particles of the solar wind into distant space, forming the fast solar wind. || ", "hits": 23 }, { "id": 11255, "url": "https://svs.gsfc.nasa.gov/11255/", "result_type": "Produced Video", "release_date": "2013-04-22T14:00:00-04:00", "title": "Three Years of SDO Images", "description": "In the three years since it first provided images of the sun in the spring of 2010, NASA's Solar Dynamics Observatory (SDO) has had virtually unbroken coverage of the sun's rise toward solar maximum, the peak of solar activity in its regular 11-year cycle. This video shows those three years of the sun at a pace of two images per day. Each image is displayed for two frames at a 29.97 frame rate.SDO's Atmospheric Imaging Assembly (AIA) captures a shot of the sun every 12 seconds in 10 different wavelengths. The images shown here are based on a wavelength of 171 angstroms, which is in the extreme ultraviolet range and shows solar material at around 600,000 Kelvin. In this wavelength it is easy to see the sun's 25-day rotation as well as how solar activity has increased over three years.During the course of the video, the sun subtly increases and decreases in apparent size. This is because the distance between the SDO spacecraft and the sun varies over time. The image is, however, remarkably consistent and stable despite the fact that SDO orbits the Earth at 6,876 miles per hour and the Earth orbits the sun at 67,062 miles per hour.Such stability is crucial for scientists, who use SDO to learn more about our closest star. These images have regularly caught solar flares and coronal mass ejections in the act, types of space weather that can send radiation and solar material toward Earth and interfere with satellites in space. SDO's glimpses into the violent dance on the sun help scientists understand what causes these giant explosions — with the hopes of some day improving our ability to predict this space weather.The four wavelength view at the end of the video shows light at 4500 angstroms, which is basically the visible light view of the sun, and reveals sunspots; light at 193 angstroms which highlights material at 1 million Kelvin and reveals more of the sun's corona; light at 304 angstroms which highlights material at around 50,000 Kelvin and shows features in the transition region and chromosphere of the sun; and light at 171 angstroms.Noteworthy events that appear briefly in the main sequence of this video:00:30;24 Partial eclipse by the moon00:31;16 Roll maneuver01:11;02 August 9, 2011 X6.9 Flare, currently the largest of this solar cycle01:28;07 Comet Lovejoy, December 15, 201101:42;29 Roll Maneuver01:51;07 Transit of Venus, June 5, 201202:28;13 Partial eclipse by the moonWatch this video on YouTube. || ", "hits": 114 }, { "id": 11203, "url": "https://svs.gsfc.nasa.gov/11203/", "result_type": "Produced Video", "release_date": "2013-02-11T10:00:00-05:00", "title": "SDO: Year 3", "description": "On Feb. 11, 2010, NASA launched an unprecedented solar observatory into space. The Solar Dynamics Observatory (SDO) flew up on an Atlas V rocket, carrying instruments that scientists hoped would revolutionize observations of the sun. If all went according to plan, SDO would provide incredibly high-resolution data of the entire solar disk almost as quickly as once a second. When the science team released its first images in April of 2010, SDO's data exceeded everyone's hopes and expectations, providing stunningly detailed views of the sun. In the three years since then, SDO's images have continued to show breathtaking pictures and movies of eruptive events on the sun. Such imagery is more than just pretty, they are the very data that scientists study. By highlighting different wavelengths of light, scientists can track how material on the sun moves. Such movement, in turn, holds clues as to what causes these giant explosions, which, when Earth-directed, can disrupt technology in space. SDO is the first mission in a NASA's Living With a Star program, the goal of which is to develop the scientific understanding necessary to address those aspects of the sun-Earth system that directly affect our lives and society. NASA's Goddard Space Flight Center in Greenbelt, Md. built, operates, and manages the SDO spacecraft for NASA's Science Mission Directorate in Washington, D.C.SDO: Year One here.SDO: Year 2 here.Information about the individual clips used in this video is here.Watch this video on YouTube. || ", "hits": 71 }, { "id": 3981, "url": "https://svs.gsfc.nasa.gov/3981/", "result_type": "Visualization", "release_date": "2012-11-20T09:00:00-05:00", "title": "The Active Sun from SDO: 193 Ångstroms", "description": "The Solar Dynamics Observatory (SDO) observes the Sun with many different instruments, in many different wavelengths of light. Many of these capabilities are not possible for ground-based observatories - hence the need for a space-based observing platform.This movie is generated for a wavelength of 193 Ångstroms (19.3 nanometers) which highlights a spectral line emitted by iron atoms that have lost 11 electrons (also known as iron-12 or Fe XII) at temperatures of 1,000,000 K as well as iron atoms that have lost 23 electrons (also known as iron-24 or FeXXIV) at temperatures of 20,000,000K. The former represents a slightly higher region of the corona and the latter represents the much hotter material of a solar flare. This wavelength also makes coronal holes (which appear as dark regions near the solar surface) more visible.This visualization is one of a set of visualizations (others linked below) covering the same time span of 17 hours over the full wavelength range of the mission. They are setup to play synchronously on a Hyperwall, or can be run individually.The images are sampled every 36 seconds, 1/3 of the standard time-cadence for SDO. This visualization is useful for illustrating how different solar phenomena, such as sunspots and active regions, look very different in different wavelengths of light. These differences enable scientists to study them more completely, with an eventual goal of improving Space Weather forecasting. || ", "hits": 111 }, { "id": 4008, "url": "https://svs.gsfc.nasa.gov/4008/", "result_type": "Visualization", "release_date": "2012-11-20T09:00:00-05:00", "title": "SDO Jewelbox: The Many Eyes of SDO", "description": "5x3 Layout view. This version has the imagery organized in order of increasing wavelength, from upper left to lower right for AIA. The HMI products occupy the bottom row. || SDOJewelbox_5x3.0100.jpg (2400x810) [317.7 KB] || SDOJewelbox_5x3.0100_web.png (320x108) [28.9 KB] || SDOJewelbox_5x3.0100_thm.png (80x40) [3.7 KB] || SDOJewelbox_5x3.0100_searchweb.png (320x180) [29.2 KB] || SDOJewelbox_5x3.webmhd.webm (960x540) [3.3 MB] || SDOJewelbox_5x3.mov (2400x810) [91.5 MB] || SDOJewelbox_5x3.mp4 (2400x810) [91.5 MB] || 2400x810_80x27_30p (2400x810) [0 Item(s)] || ", "hits": 51 }, { "id": 3999, "url": "https://svs.gsfc.nasa.gov/3999/", "result_type": "Visualization", "release_date": "2012-10-26T00:00:00-04:00", "title": "The View from SDO: The August 31, 2012 Filament Eruption", "description": "The Solar Dynamics Observatory (SDO) observed a large filament eruption on August 31, 2012. This visualization was generated using high time resolution (12 seconds) data from the Atmospheric Imaging Assembly (AIA). Two datasets are used, the SDO/AIA 304 Ångstrom wavelength (orange color table) and the 171 Ångstrom wavelength (gold color table). These are wavelengths in the ultraviolet band of the electromagnetic spectrum. They are not visible to the human eye or to ground-based telescopes so coded colors are used in presentation.It is the source material for \"August 31, 2012 Magnificent CME\" visualization. || ", "hits": 83 }, { "id": 3965, "url": "https://svs.gsfc.nasa.gov/3965/", "result_type": "Visualization", "release_date": "2012-07-20T00:00:00-04:00", "title": "Impressionist Sun: SDO Source Images", "description": "A set of multi-wavelength views of the Sun from SDO provided source and context imagery for the Van Gogh Sun video. This video illustrates how imagery is converted into physical parameters teaching us more about the physical processes taking place in the solar atmosphere. || ", "hits": 28 }, { "id": 11046, "url": "https://svs.gsfc.nasa.gov/11046/", "result_type": "Produced Video", "release_date": "2012-07-19T10:00:00-04:00", "title": "Van Gogh Sun", "description": "A crucial, and often underappreciated, facet of science lies in deciding how to turn the raw numbers of data into useful, understandable information — often through graphs and images. Such visualization techniques are needed for everything from making a map of planetary orbits based on nightly measurements of where they are in the sky to colorizing normally invisible light such as X-rays to produce \"images\" of the sun.More information, of course, requires more complex visualizations and occasionally such images are not just informative, but beautiful too.Such is the case with a new technique created by Nicholeen Viall, a solar scientist at NASA's Goddard Space Flight Center in Greenbelt, Md. She creates images of the sun reminiscent of Van Gogh, with broad strokes of bright color splashed across a yellow background. But it's science, not art. The color of each pixel contains a wealth of information about the 12-hour history of cooling and heating at that particular spot on the sun. That heat history holds clues to the mechanisms that drive the temperature and movements of the sun's atmosphere, or corona.To look at the corona from a fresh perspective, Viall created a new kind of picture, making use of the high resolution provided by NASA's Solar Dynamics Observatory (SDO). SDO's Atmospheric Imaging Assembly (AIA) provides images of the sun in 10 different wavelengths, each approximately corresponding to a single temperature of material. Therefore, when one looks at the wavelength of 171 angstroms, for example, one sees all the material in the sun's atmosphere that is a million degrees Kelvin. By looking at an area of the sun in different wavelengths, one can get a sense of how different swaths of material change temperature. If an area seems bright in a wavelength that shows a hotter temperature an hour before it becomes bright in a wavelength that shows a cooler temperature, one can gather information about how that region has changed over time.Viall's images show a wealth of reds, oranges, and yellow, meaning that over a 12-hour period the material appear to be cooling. Obviously there must have been heating in the process as well, since the corona isn't on a one-way temperature slide down to zero degrees. Any kind of steady heating throughout the corona would have shown up in Viall's images, so she concludes that the heating must be quick and impulsive — so fast that it doesn't show up in her images. This lends credence to those theories that say numerous nanobursts of energy help heat the corona. || ", "hits": 27 }, { "id": 10745, "url": "https://svs.gsfc.nasa.gov/10745/", "result_type": "Produced Video", "release_date": "2011-06-07T09:00:00-04:00", "title": "SDO Catches Surf Waves on the Sun", "description": "Scientists have spotted the iconic surfer's wave rolling through the atmosphere of the sun. This makes for more than just a nice photo-op: the waves hold clues as to how energy moves through that atmosphere, known as the corona. Since scientists know how these kinds of waves — initiated by a Kelvin-Helmholtz instability if you're being technical — disperse energy in the water, they can use this information to better understand the corona. This in turn, may help solve an enduring mystery of why the corona is thousands of times hotter than originally expected.Kelvin-Helmholtz instabilities occur when two fluids of different densities or different speeds flow by each other. In the case of ocean waves, that's the dense water and the lighter air. As they flow past each other, slight ripples can be quickly amplified into the giant waves loved by surfers. In the case of the solar atmosphere, which is made of a very hot and electrically charged gas called plasma, the two flows come from an expanse of plasma erupting off the sun's surface as it passes by plasma that is not erupting. The difference in flow speeds and densities across this boundary sparks the instability that builds into the waves. In order to confirm this description, the team developed a computer model to see what takes place in the region. Their model showed that these conditions could indeed lead to giant surfing waves rolling through the corona. Seeing the big waves suggests they can cascade down to smaller forms of turbulence too. Scientists believe that the friction created by turbulence — the simple rolling of material over and around itself — could help add heating energy to the corona. The analogy is the way froth at the top of a surfing wave provides friction that will heat up the wave. || ", "hits": 25 }, { "id": 3692, "url": "https://svs.gsfc.nasa.gov/3692/", "result_type": "Visualization", "release_date": "2010-04-21T14:15:00-04:00", "title": "SDO/AIA CME Event of April 8, 2010 (Multiband)", "description": "This is a close-up view of the April 8 CME in ultraviolet light which reveals a wave (darker regions) expanding outward from the flare event. This movie creates a color image by combining filters for 211 Ångstroms (red), 193 Ångstroms (green) and 171 Ångstroms (blue). || ", "hits": 24 }, { "id": 3695, "url": "https://svs.gsfc.nasa.gov/3695/", "result_type": "Visualization", "release_date": "2010-04-21T14:15:00-04:00", "title": "SDO/AIA CME Event of April 8, 2010 Full Disk (Multiband)", "description": "This visualization is a full-disk view of the CME launched from the Sun on April 8, 2010. This is a 3-color image produced by combining three different filters from the AIA instrument: 211 (red), 193 (green), and 171 (blue). || ", "hits": 30 }, { "id": 3691, "url": "https://svs.gsfc.nasa.gov/3691/", "result_type": "Visualization", "release_date": "2010-03-31T00:00:00-04:00", "title": "A Comparative View of the Sun: SDO/AIA 193 and SOHO/EIT 195", "description": "This movie compares the spatial and temporal resolutions of the SDO/AIA (Atmospheric Imaging Assembly) imager to the SOHO/EIT (Extreme ultraviolet Imaging Telescope) imager. SOHO/EIT's highest resolution is 1024x1024 pixels with images taken about every 12 minutes for the 195 Ångstrom band. The SDO/AIA 193 band takes images at 4096x4096 pixels every twelve seconds!In this movie we can see the difference this makes for a closeup view of Active Region 1087. EIT reveals changes in the active region, which AIA reveals many details.This visualization is a companion piece to A Comparative View of the Sun: SDO/AIA 193 and STEREO-B/EUVI 195. || ", "hits": 54 }, { "id": 3694, "url": "https://svs.gsfc.nasa.gov/3694/", "result_type": "Visualization", "release_date": "2010-03-24T00:00:00-04:00", "title": "A Comparative View of the Sun: SDO/AIA 193 and STEREO-B/EUVI 195", "description": "This movie compares the spatial and temporal resolutions of the SDO/AIA (Atmospheric Imaging Assembly) imager to the STEREO/EUVI (Extreme UltraViolet Imager) imager. STEREO-B/EUVI's highest resolution is 2048x2048 pixels with images taken about every 5 minutes for the 195 Ångstrom band. The SDO/AIA 193 band takes images at 4096x4096 pixels every twelve seconds!While STEREO's vantage point at this time is very different from SDO, we can still identify some features of the Active Region 1087 in these two views. EUVI shows the launch of the filament, while AIA reveals many finer details.This visualization is a companion piece to A Comparative View of the Sun: SDO/AIA 193 and SOHO/EIT 195. || ", "hits": 36 } ] }