{ "id": 10865, "url": "https://svs.gsfc.nasa.gov/10865/", "page_type": "Produced Video", "title": "Sentinels Of The Heliosphere", "description": "Space around Earth is anything but a barren vacuum. The area seethes with constantly changing electric and magnetic fields. Charged particles move energy around, create electric currents, produce the aurora, and sometimes even damage technology in space. Many of these particles stream in from the solar wind and travel 93 million miles from the surface of the sun. Other areas are dominated by particles of a more local source: Earth's atmosphere. This entire electromagnetic environment, from the sun to the edges of the solar system, is known as the heliosphere. As illustrated in the visualization below, a fleet of NASA spacecraft—some orbiting tightly around Earth, some closer to the sun, and two almost to the edge of the solar system—try to understand this complex, dynamic system. Using all of these resources together, researchers will learn how to predict changes in space weather and protect spacecraft and astronauts from this harsh environment. || ", "release_date": "2011-11-22T00:00:00-05:00", "update_date": "2023-05-03T13:53:27.247204-04:00", "main_image": { "id": 481406, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010800/a010865/sentinels_STILL14120_1024x576.jpg", "filename": "sentinels_STILL14120_1024x576.jpg", "media_type": "Image", "alt_text": "NASA's heliophysics fleet of more than 20 spacecraft studies the dynamic electromagnetic system stretching from the sun to Earth.", "width": 1024, "height": 576, "pixels": 589824 }, "main_video": null, "main_credits": { "Visualizations by": [ { "name": "Greg Shirah", "employer": "NASA/GSFC" } ], "Scientific consulting by": [ { "name": "Jennifer Rumburg", "employer": "NASA/OSC" }, { "name": "Jeffrey Hayes", "employer": "NASA/HQ" } ], "Written by": [ { "name": "Karen Fox", "employer": "ADNET Systems, Inc." } ] }, "progress": "Complete", "media_groups": [ { "id": 350611, "url": "https://svs.gsfc.nasa.gov/10865/#media_group_350611", "widget": "Basic text with HTML", "title": "", "caption": "", "description": "Space around Earth is anything but a barren vacuum. The area seethes with constantly changing electric and magnetic fields. Charged particles move energy around, create electric currents, produce the aurora, and sometimes even damage technology in space. Many of these particles stream in from the solar wind and travel 93 million miles from the surface of the sun. Other areas are dominated by particles of a more local source: Earth's atmosphere. This entire electromagnetic environment, from the sun to the edges of the solar system, is known as the heliosphere. As illustrated in the visualization below, a fleet of NASA spacecraft—some orbiting tightly around Earth, some closer to the sun, and two almost to the edge of the solar system—try to understand this complex, dynamic system. 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As a result, it encompasses the study of planetary atmospheres and their magnetic environment, or magnetospheres. These environments are important in the study of space weather.As a society dependent on technology, both in everyday life, and as part of our economic growth, space weather becomes increasingly important. Changes in space weather, either by solar events or geomagnetic events, can disrupt and even damage power grids and satellite communications. Space weather events can also generate x-rays and gamma-rays, as well as particle radiations, that can jeopardize the lives of astronauts living and working in space.This visualization tours the regions of near-Earth orbit; the Earth's magnetosphere, sometimes called geospace; the region between the Earth and the Sun; and finally out beyond Pluto, where Voyager 1 and 2 are exploring the boundary between the Sun and the rest of our Milky Way galaxy. Along the way, we see these regions patrolled by a fleet of satellites that make up NASA's Heliophysics Observatory Telescopes. Many of these spacecraft do not take images in the conventional sense but record fields, particle energies and fluxes in situ. Many of these missions are operated in conjunction with international partners, such as the European Space Agency (ESA) and the Japanese Space Agency (JAXA).The Earth and distances are to scale. Larger objects are used to represent the satellites and other planets for clarity.Here are the spacecraft featured in this movie:Near-Earth Fleet:Hinode: Observes the Sun in multiple wavelengths up to x-rays. SVS pageRHESSI : Observes the Sun in x-rays and gamma-rays. SVS pageTRACE: Observes the Sun in visible and ultraviolet wavelengths. SVS pageTIMED: Studies the upper layers (40-110 miles up) of the Earth's atmosphere.FAST: Measures particles and fields in regions where aurora form.CINDI: Measures interactions of neutral and charged particles in the ionosphere. AIM: Images and measures noctilucent clouds. SVS pageGeospace Fleet:Geotail: Conducts measurements of electrons and ions in the Earth's magnetotail. Cluster: This is a group of four satellites which fly in formation to measure how particles and fields in the magnetosphere vary in space and time. SVS pageTHEMIS: This is a fleet of five satellites to study how magnetospheric instabilities produce substorms. SVS pageL1 Fleet: The L1 point is a Lagrange Point, a point between the Earth and the Sun where the gravitational pull is approximately equal. Spacecraft can orbit this location for continuous coverage of the Sun.SOHO: Studies the Sun with cameras and a multitude of other instruments. SVS pageACE: Measures the composition and characteristics of the solar wind. Wind: Measures particle flows and fields in the solar wind. Heliospheric FleetSTEREO-A and B: These two satellites observe the Sun, with imagers and particle detectors, off the Earth-Sun line, providing a 3-D view of solar activity. SVS pageHeliopause FleetVoyager 1 and 2: These spacecraft conducted the original 'Planetary Grand Tour' of the solar system in the 1970s and 1980s. They have now travelled further than any human-built spacecraft and are still returning measurements of the interplanetary medium. SVS pageThis enhanced, narrated visualization was shown at the SIGGRAPH 2009 Computer Animation Festival in New Orleans, LA in August 2009; an eariler version created for AGU was called NASA's Heliophysics Observatories Study the Sun and Geospace. || ", "release_date": "2009-07-27T00:00:00-04:00", "update_date": "2025-01-05T22:01:59.957021-05:00", "main_image": { "id": 496868, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003500/a003595/Sentinels01500.jpg", "filename": "Sentinels01500.jpg", "media_type": "Image", "alt_text": "This movie shows the orbits of the fleet of NASA spacecraft exploring the heliosphere.For complete transcript, click here.This video is also available on our YouTube channel.", "width": 1920, "height": 1080, "pixels": 2073600 } } ], "sources": [], "products": [], "newer_versions": [], "older_versions": [], "alternate_versions": [] }