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Spicule (solar physics)

... Spicules, visible as dark tubes. Solar active region 10380, J... ... Spicules, visible as dark tubes. Solar active region 10380, June 2004 In solar physics, a spicule is ... ...l links Description Spicules last for about 15 minutes;[1] at the solar limb they appear elong... ...fibrils"). They are usually associated with regions of high magnetic flux; their mass flux is about 100 times that of the solar wind. They rise at a r... ...nbsp;km altitude above the photosphere.[2] Causes Bart De Pontieu (Lockheed Martin Solar and Astrophysics Labor... ... Solar wind Flare ...

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Solar proton event

Solar Dynamics Observatory

...d = 1436.06 minutes apsis = gee /> The Solar Dynamics Observatory ( SDO ) is a NASA mission which will observe ... ...the influence of the Sun on the Earth and near-Earth space by studying the solar atmosphere on small scales of space and time and in many wavelengths ... ...nverted and released into the heliosphere and geospace in the form of solar wind, energetic particles, and variations in the solar irradiance . ... ...to last for ten years. Some consider SDO to be a follow-on mission to the Solar and Heliospheric Observatory (SOHO). SDO is a 3-axis stabilized sp... ...ric Observatory (SOHO). SDO is a 3-axis stabilized spacecraft, with two solar arrays, and two high-gain antennas. The spacecraft includes three ins... ... 6.3×105  K 19.3  nm Fe XII, XXIV Corona & hot flare plasma 1.2×106 & 2x107  K 21.1  nm Fe XIV ...

Index of solar energy articles

...opics A Air mass coefficient Artificial photosynthesis B BP Solar - BrightSource Energy - Building-integrated photovoltaics C ... ...egrated photovoltaics C Carbon nanotubes in photovoltaics - Central solar heating plant - Community solar farm - Compact linear Fresnel ref... ...linear Fresnel reflector - Concentrating photovoltaics - Concentrating solar power - Crookes radiometer D Daylighting - Deployment of sol... ... Deployment of solar power to energy grids - Desertec - Drake Landing Solar Community - Horace de Saussure - Dye-sensitized solar cell E ... ... E Effect of sun angle on climate - Energy tower (downdraft) - EURO-SOLAR Programme - European Photovoltaic Industry Association F Feed-... ...r eclipse - Solar Energy Generating Systems - Solar easement - Solar flare - Solar fuel - Solar furnace - Solar greenhouse (technical) - ...

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Photosphere

...er but more tenuous corona . Other "surface features" on the photosphere are solar flare s and sunspot s. Animated explanation of the Photosphere ... ... more tenuous corona . Other "surface features" on the photosphere are solar flare s and sunspot s. Animated explanation of the Photosphere (Univ...

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List of solar cycles

... The following is a list of solar cycles (sometimes called sunspot cycles), tracked since... ... Spotless days (end of cycle)[6][7][8] Solar cycle 1 1755 August ... ... 11.2 Solar cycle 2 1766 March ... ... 7.2 Solar cycle 3 1775 August ... ... 9.5 Solar cycle 4 1784 June ... ... Solar wind Flare ...

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Solar cycle

... the periodic change in the sun's activity (including changes in the levels of solar radiation and ejection of solar material) and appearance (visible... ...olar material) and appearance (visible in changes in the number of sunspot s, flares, and other visible manifestations). Solar cycles have an average... ...hanges in the number of sunspot s, flares, and other visible manifestations). Solar cycles have an average duration of about 11 years. They have bee... ...ance and by changes seen on Earth, such as aurora s) for hundreds of years. Solar variation causes changes in space weather, weather, and climat... ...iation from the Sun that is experienced on Earth. It is one component of solar variation, the other being aperiodic fluctuations. Powered by a ... ... by a hydromagnetic dynamo process, driven by the inductive action of internal solar flows, the solar cycle: Structures the Sun's atmosphere, its co... ...on, from ultraviolet to X-ray ;Modulates the occurrence frequency of solar flare s, coronal mass ejection s, and other geoeffective solar eruptiv...

Timeline of solar astronomy

...rate the rotation of the Sun 1619 — Johannes Kepler postulates a solar wind to explain the direction of comet tails ... ...ury 1802 — William Hyde Wollaston observes dark lines in the solar spectrum 1814 — Jos... ... 1814 — Joseph Fraunhofer systematically studies the dark lines in the solar spectrum 1834 — Her... ...geomagnetic field variations 1859 — Richard Carrington discovers solar flares 1860 — Gusta... ...netic field variations 1859 — Richard Carrington discovers solar flares 1860 — Gustav Kirc... ... 1861 — Gustav Spörer discovers the variation of sun-spot latitudes during a solar cycle, explained by Spörer's law ... ... 21st century 2004 — largest solar flare ever recorded occurs Cat...

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Solar and Heliospheric Observatory

...n to its scientific mission, it is currently the main source of near-real-time solar data for space weather prediction. Along with the GGS Wind an... ...rements via the NASA Deep Space Network of ground stations. SOHOs data about solar activity are used to predict solar flare s, so electrical grid ... ...of ground stations. SOHOs data about solar activity are used to predict solar flare s, so electrical grid s and satellite s can be protected from t... ... grid s and satellite s can be protected from their damaging effects (mainly, solar flares may produce geomagnetic storm s, which in turn produce g... ...s and satellite s can be protected from their damaging effects (mainly, solar flares may produce geomagnetic storm s, which in turn produce geomagn...

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List of Solar System probes

...ailed), organised by their planned destination. It includes planetary probes, solar probes, and probes to asteroids and comets, but excludes lunar pr... ...successful completion of the flyby, not necessarily that of the main mission. Solar probes While the Sun is not physically explorable with current te... ...e the Sun is not physically explorable with current technology, the following solar observation probes have been designed and launched to operate in... ...eliocentric orbit or at one of the Earth–Sun Lagrangian point s – additional solar observatories were placed in Earth-orbiting and are not included ... ... DOD March–April 1960 orbiter success measured magnetic field phenomena, solar flare particles, and ionization in the interplanetary region ... ... March–April 1960 orbiter success measured magnetic field phenomena, solar flare particles, and ionization in the interplanetary region colsp...

Reuven Ramaty High Energy Solar Spectroscopic Imager

...Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI, or more rarely Explorer 81 or originall... ...copic Imager (RHESSI, or more rarely Explorer 81 or originally High Energy Solar Spectroscopic Imager or HESSI) is the sixth mission in the line of NA... ...the basic physics of particle acceleration and explosive energy release in solar flares. was renamed to on March 29, 2002 in honor of Reuven Ramat... ...sic physics of particle acceleration and explosive energy release in solar flares. was renamed to on March 29, 2002 in honor of Reuven Ramaty, a p... ...h 29, 2002 in honor of Reuven Ramaty, a pioneer in the area of high energy solar physics - RHESSI is the first space mission named after a NASA scient... ... Laboratory in Berkeley California. Mission concept is designed to image solar flares in energetic photons from soft X rays (~3 keV) to gamma rays (... ...atory in Berkeley California. Mission concept is designed to image solar flares in energetic photons from soft X rays (~3 keV) to gamma rays (up to ... ...c objectives Researchers believe that much of the energy released during a flare is used to accelerate, to very high energies, electrons (emitting pri... ...standing of the fundamental high-energy processes at the core of the solar flare problem. The primary scientific objective of RHESSI is to understan...

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Solar System

...such as Halley's Comet . The overall structure of the charted regions of the Solar System consists of the Sun, four relatively small inner planets s... ...rs sometimes informally divide this structure into separate regions. The inner Solar System includes the four terrestrial planets and the asteroid bel... ... System includes the four terrestrial planets and the asteroid belt. The outer Solar System is beyond the asteroids, including the four gas giants. Si... ...gas giants. Since the discovery of the Kuiper belt, the outermost parts of the Solar System are considered a distinct region consisting of the objects... ...t region consisting of the objects beyond Neptune. Most of the planets in the Solar System possess secondary systems of their own, being orbited by p... ... 100 AU (see heliopause ). Activity on the Sun's surface, such as solar flare s and coronal mass ejection s, disturb the heliosphere, creating...

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Lalande 21185

...on NSV 18593. Several star catalogs, including SIMBAD, also classify it as a flare star . This conclusion is not supported by the primary reference ...

II Pegasi

Cosmic storm

...racting galaxies Coronal mass ejection Solar flare Nebula ... ...g galaxies Coronal mass ejection Solar flare Nebula ...

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Plage (astronomy)

... plage occurs most visibly near a sunspot region. Faculae have a strong influence on the solar constant, and the more readily detectable (because chro... ... ^ Topka, K. P.; Tarbell, T. D.; Title, A. M. (1997). "Properties of the Smallest Solar Magnetic Elements. II. Observations versus Hot Wall Mod... ... Solar cycle ... ...le List of solar cycles ... ... Solar maximum ... ... Solar wind Flare ...

Arctowski Medal

... The Arctowski Medal is awarded by the U.S. National Academy of Sciences "for studies in solar physics and solar-terrestrial relationships." Named in ... ...g[2] (2013) For elucidating fundamental issues in the physics of the solar atmosphere and solar wind, including revealing the "Sol... ...es in the physics of the solar atmosphere and solar wind, including revealing the "Solar Flare Myth", discovering bi-directional solar-electron stream... ...e and solar wind, including revealing the "Solar Flare Myth", discovering bi-directional solar-electron streaming and, in the last decade, finding rec... ...nal solar-electron streaming and, in the last decade, finding reconnection events in the solar wind. John W. Harvey[3] (2011) ... ...gebauer[4] (2010) For definitively establishing the existence of the solar wind, critical to understanding the physics of the heli... ...ng of solar magnetic activity, especially with regard to the genesis and effect of solar flares. John A. Eddy (1987) ... ... solar modulation and acceleration of high energy particles and the discoveries of solar flare gamma rays and auroral X-rays. Jacq...

Andrei Severny

Wolf 424

...5. Wolf 424A is a cool main sequence red dwarf star of approximately 0.14 solar masses (147 Jupiters) and a radius of 0.17 solar radii. Its companion... ...n, Wolf 424B, is a cool main sequence red dwarf star of approximately 0.13 solar masses (136 Jupiters) and a radius of 0.14 solar radii. They are two ... ...within 15 light years of the Sun. In 1967, it was discovered that both are flare stars that undergo random increases in luminosity. The system has bee... ...perience sunspot activity. The stars may undergo variation in the level of flare activity over periods lasting several years. The stars of Wolf 424 a...

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Charles Augustus Young

...Augustus Young (December 15, 1834 – January 4, 1908) one of the foremost solar spectroscopist astronomer s in the United States, died of pneum... ...ness, at his home in Hanover, New Hampshire, on 4 January 1908. He observed solar eclipse s and worked on spectroscopy of the Sun . He observed ... ...solar eclipse s and worked on spectroscopy of the Sun . He observed a solar flare with a spectroscope on 3 August, 1872, and also noted that it coi...