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A surprising result was that at the moment of interconnection between the sun’s magnetic field lines and those of Earth the crescents turned abruptly so that the electrons flowed along the field lines. By watching these electron tracers, MMS made the first observation of the predicted breaking and interconnection of magnetic fields in space. 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It shows magnetic field lines in black with the background color denoting the electric current density directed out of the plane. Red regions have stronger electric currents. The breaking of magnetic fields in these high current regions is magnetic reconnection. In the event observed by MMS, Earth would be to the left and the Sun would be far to the right. The spacecraft crossed through the region where reconnection occurs in the vertical direction. The movie is courtesy of Paul Cassak, Department of Physics and Astronomy, West Virginia University, with input from Tai Phan (Berkeley), Jim Burch (SwRI), and Jerry Goldstein (SwRI). 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Magnetic reconnections take place on the day and night side of the planet and are caused by the interaction of Earth’s magnetic field with charged particles released from the sun called the solar wind. The four spacecraft, each identically engineered, make up the Magnetospheric Multiscale, or MMS, mission. Flying in a pyramid-shaped configuration, the spacecraft will orbit Earth and pass through areas known to be reconnection sites. Each reconnection event unleashes a massive burst of energy that can accelerate particles within Earth’s protective magnetic environment, known as the magnetosphere, to nearly the speed of light. Sensors onboard the spacecraft will measure the energy and movement of charged particles during an event, providing scientists with the first three-dimensional look at this phenomenon. Watch the video to learn more. || ", "release_date": "2015-01-15T11:00:00-05:00", "update_date": "2023-05-03T13:50:07.349263-04:00", "main_image": { "id": 447386, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011700/a011700/c-1024_print.jpg", "filename": "c-1024_print.jpg", "media_type": "Image", "alt_text": "Four NASA spacecraft will probe the near-space environment around our planet for magnetic explosions.", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 20214, "url": "https://svs.gsfc.nasa.gov/20214/", "page_type": "Animation", "title": "MMS Launch and Deployment", "description": "This animation follows Magnetosphere Multiscale(MMS) Mission from launch at Kennedy Space Center through deployment and on station doing science. The MMS mission is comprising four identically instrumented spacecraft that will use Earth’s magnetosphere as a laboratory to study the microphysics of three fundamental plasma processes: magnetic reconnection, energetic particle acceleration, and turbulence. || ", "release_date": "2014-10-06T00:00:00-04:00", "update_date": "2025-01-06T01:38:29.459691-05:00", "main_image": { "id": 450898, "url": "https://svs.gsfc.nasa.gov/vis/a020000/a020200/a020214/MMS_LD_Final.0450_print.jpg", "filename": "MMS_LD_Final.0450_print.jpg", "media_type": "Image", "alt_text": "MMS Launch and Deployment Animation", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 11485, "url": "https://svs.gsfc.nasa.gov/11485/", "page_type": "Produced Video", "title": "MMS Narrated Orbit", "description": "Scientist John Dorelli explains the MMS mission's orbit and why the four spacecraft fly in a tetrahedron formation. On its journey, MMS will observe a little-understood, but universal phenomenon called magnetic reconnection, responsible for dramatic re-shaping of the magnetic environment near Earth, often sending intense amounts of energy and fast-moving particles off in a new direction. Not only is this a fundamental physical process that occurs throughout the universe, it is also one of the drivers of space weather events at Earth. To truly understanding the process, requires four identical spacecraft to track how such reconnection events move across and through any given space in 3D. || ", "release_date": "2014-05-06T00:00:00-04:00", "update_date": "2025-01-12T00:19:53.500392-05:00", "main_image": { "id": 458165, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011400/a011485/G2014-018_MMS_Narrated_OrbitV4-H264_Good_1280x720_29.97_web.png", "filename": "G2014-018_MMS_Narrated_OrbitV4-H264_Good_1280x720_29.97_web.png", "media_type": "Image", "alt_text": "Watch this video on the NASAexplorer YouTube channel.", "width": 320, "height": 180, "pixels": 57600 } }, { "id": 11524, "url": "https://svs.gsfc.nasa.gov/11524/", "page_type": "Produced Video", "title": "3 Days in 1 Minute: Stacking the MMS Spacecraft", "description": "The Magnetospheric Multiscale, or MMS, mission stacked all four of its spacecraft in preparation for vibration testing. This time lapse shows one image every thirty seconds over three days of work. First, the spacecraft are assembled into mini-stacks, or placed on top of each other in sets of two. To create a full stack, engineers lift one mini-stack on top of another.Vibration testing simulates the conditions that the MMS spacecraft will experience during launch.MMS will study how the sun and the Earth's magnetic fields connect and disconnect, an explosive process that can accelerate particles through space to nearly the speed of light. This process is called magnetic reconnection and can occur throughout all space. || ", "release_date": "2014-04-18T10:00:00-04:00", "update_date": "2025-01-12T00:19:53.691144-05:00", "main_image": { "id": 456231, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011500/a011524/MMSstack720.jpg", "filename": "MMSstack720.jpg", "media_type": "Image", "alt_text": "Watch this video on the NASAexplorer YouTube channel.", "width": 1280, "height": 720, "pixels": 921600 } }, { "id": 20210, "url": "https://svs.gsfc.nasa.gov/20210/", "page_type": "Animation", "title": "MMS Spacecraft Animation", "description": "The Magnetospheric Multiscale (MMS) mission is a Solar Terrestrial Probes mission comprising four identically instrumented spacecraft that will use Earth’s magnetosphere as a laboratory to study the microphysics of three fundamental plasma processes: magnetic reconnection, energetic particle acceleration, and turbulence. These processes occur in all astrophysical plasma systems but can be studied in situ only in our solar system and most efficiently only in Earth’s magnetosphere, where they control the dynamics of the geospace environment and play an important role in the processes known as “space weather.”Learn more about MMS at www.nasa.gov/mms || ", "release_date": "2014-03-14T10:30:00-04:00", "update_date": "2025-01-13T00:18:48.835899-05:00", "main_image": { "id": 457344, "url": "https://svs.gsfc.nasa.gov/vis/a020000/a020200/a020210/MMS_Solo00600.jpg", "filename": "MMS_Solo00600.jpg", "media_type": "Image", "alt_text": "MMS beauty pass showing 4 observatories on the dayside.", "width": 1920, "height": 1080, "pixels": 2073600 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }