{ "count": 8, "next": null, "previous": null, "results": [ { "id": 10790, "url": "https://svs.gsfc.nasa.gov/10790/", "result_type": "Produced Video", "release_date": "2011-06-09T12:00:00-04:00", "title": "Voyager Satellites Find Magnetic Bubbles at Edge of Solar System", "description": "The sun's magnetic field spins opposite directions on the north and south poles. These oppositely pointing magnetic fields are separated by a layer of current called the heliospheric current sheet. Due to the tilt of the magnetic axis in relation to the axis of rotation of the Sun, the heliospheric current sheet flaps like a flag in the wind. The flapping current sheet separates regions of oppositely pointing magnetic field, called sectors. As the solar wind speed decreases past the termination shock, the sectors squeeze together, bringing regions of opposite magnetic field closer to each other. The Voyager spacecraft have now found that when the separation of sectors becomes very small, the sectored magnetic field breaks up into a sea of nested \"magnetic bubbles\" in a phenomenon called magnetic reconnection. The region of nested bubbles is carried by the solar wind to the north and south filling out the entire front region of the heliopause and the sector region in the heliosheath.This discovery has prompted a complete revision of what the heliosheath region looks like. The smooth, streamlined look is gone, replaced with a bubbly, frothy outer layer. More animations about the Voyager magnetic bubbles discovery are available. || ", "hits": 173 }, { "id": 10791, "url": "https://svs.gsfc.nasa.gov/10791/", "result_type": "Produced Video", "release_date": "2011-06-09T12:00:00-04:00", "title": "Voyager Heliosheath Bubbles Animations", "description": "Animations showing the new Voyager findings about the magnetic field in the heliosheath.For more videos and stills about the Voyager magnetic bubbles discovery, go here. || ", "hits": 119 }, { "id": 10789, "url": "https://svs.gsfc.nasa.gov/10789/", "result_type": "Produced Video", "release_date": "2011-06-07T14:00:00-04:00", "title": "NPPy: Big Planet, Little Bear", "description": "NPP is the prototype of the next generation weather satellites, named JPSS. NPP has five instruments on board and will continue the legacy of existing weather satellites like Terra and Aqua. NPP will deliver critical data not only for weather forecasters but for scientists who are trying to understand how climate is changing over long periods of time. || ", "hits": 44 }, { "id": 10747, "url": "https://svs.gsfc.nasa.gov/10747/", "result_type": "Produced Video", "release_date": "2011-04-28T09:00:00-04:00", "title": "Swift and Hubble Probe an Asteroid Crash", "description": "Late last year, astronomers noticed that an asteroid named Scheila had unexpectedly brightened and it was sporting short-lived plumes. Data from NASA's Swift satellite and Hubble Space Telescope show that these changes likely occurred after Scheila was struck by a much smaller asteroid. On Dec. 11, 2010, images from the University of Arizona's Catalina Sky Survey, a project of NASA's Near Earth Object Observations Program, revealed the Scheila to be twice as bright as expected and immersed in a faint comet-like glow. Looking through the survey's archived images, astronomers inferred the outburst began between Nov. 11 and Dec. 3. Three days after the outburst was announced, Swift's Ultraviolet/Optical Telescope (UVOT) captured multiple images and a spectrum of the asteroid. Ultraviolet sunlight breaks up the gas molecules surrounding comets; water, for example, is transformed into hydroxyl (OH) and hydrogen (H). But none of the emissions most commonly identified in comets — such as hydroxyl or cyanogen (CN) — show up in the UVOT spectrum. The absence of gas around Scheila led the Swift team to reject scenarios where exposed ice accounted for the activity.Images show the asteroid was flanked in the north by a bright dust plume and in the south by a fainter one. The dual plumes formed as small dust particles excavated by the impact were pushed away from the asteroid by sunlight. Hubble observed the asteroid's fading dust cloud on Dec. 27, 2010, and Jan. 4, 2011.The two teams found the observations were best explained by a collision with a small asteroid impacting Scheila's surface at an angle of less than 30 degrees, leaving a crater 1,000 feet across. Laboratory experiments show a more direct strike probably wouldn't have produced two distinct dust plumes. The researchers estimated the crash ejected more than 660,000 tons of dust—equivalent to nearly twice the mass of the Empire State Building.For the collision animation go to #10759. || ", "hits": 45 }, { "id": 10759, "url": "https://svs.gsfc.nasa.gov/10759/", "result_type": "Produced Video", "release_date": "2011-04-28T09:00:00-04:00", "title": "(596) Scheila Asteroid Collision Animation", "description": "Late last year, astronomers noticed that an asteroid named Scheila had brightened unexpectedly and was sporting a short-lived tail. Now, data from NASA's Swift satellite and Hubble Space Telescope show that these changes likely occurred after Scheila was struck by a much smaller asteroid. || ", "hits": 55 }, { "id": 10696, "url": "https://svs.gsfc.nasa.gov/10696/", "result_type": "Produced Video", "release_date": "2010-12-02T12:00:00-05:00", "title": "Carbon Nanotubes: Blacker Than Black", "description": "The NASA Goddard Space Flight Center has a team of scientists testing micro and nano technology to use on spacecraft. The goal is to reduce the reflection off the surface of the instruments so that the data does not get polluted by the scattered light. The carbon nanotubes that the team grows have proven to be 10 times better than the NASA Z306 paint, currently used on spacecraft instruments. The nanotubes are also very robust and can be grown on different materials. The team is really close to getting the carbon nanotubes approved for spaceflight. || ", "hits": 115 }, { "id": 10655, "url": "https://svs.gsfc.nasa.gov/10655/", "result_type": "Produced Video", "release_date": "2010-09-27T00:00:00-04:00", "title": "NASA Hurricane Hunters", "description": "During the 2010 hurricane season, NASA deployed its piloted DC-8 and WB-57, and unmanned Global Hawk aircraft in a massive effort to collect as much data as possible, arming hurricane researchers with the information needed to predict the growth and intensification of hurricanes. || ", "hits": 15 }, { "id": 10637, "url": "https://svs.gsfc.nasa.gov/10637/", "result_type": "Produced Video", "release_date": "2010-09-01T08:00:00-04:00", "title": "GRIP Video File", "description": "The GRIP 2010 hurricane mission is in full force. During this year's Atlantic hurricane season, researchers will be able to \"see\" below the cloud-tops and uncover what is happening in the internal structure of the storm through the use of powerful instruments onboard the DC-8, WB-57, and Global Hawk aircraft. This will allow scientists to better understand what is required to kick-start a tropical depression into a hurricane. The NASA aircraft will be deployed from Florida (DC-8), Texas (WB-57) and California (Global Hawk) and will fly at varying altitudes over tropical storms in an attempt to capture them at different stages of development.For complete transcript, click here. || G2010-094_GRIP_VF__MASTER_appletv.01352_print.jpg (1024x576) [103.6 KB] || G2010-094_GRIP_VF__MASTER_appletv_web.png (320x180) [258.1 KB] || G2010-094_GRIP_VF__MASTER_appletv_thm.png (80x40) [16.7 KB] || G2010-094_GRIP_VF__MASTER_appletv.m4v (960x540) [218.4 MB] || G2010-094_GRIP_VF_MASTER_prores.mov (1280x720) [7.9 GB] || G2010-094_GRIP_VF_MASTER.wmv (1280x720) [191.6 MB] || G2010-094_GRIP_VF_MASTER_youtube_hq.mov (1280x720) [238.1 MB] || G2010-094_GRIP_VF__MASTER_appletv.webmhd.webm (960x540) [63.4 MB] || G2010-094_GRIP_VF_MASTER_ipod_lg.m4v (640x360) [75.2 MB] || G2010-094_GRIP_VF_MASTER_portal.mov (640x360) [161.9 MB] || G2010-094_GRIP_VF_MASTER_nasacast.mp4 (320x240) [34.8 MB] || G2010-094_GRIP_VF_MASTER_SVS.mpg (512x288) [70.2 MB] || ", "hits": 25 } ] }