The Sun: just a star, like many others...
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The_Sun-489332main_euvfilament-20101016-3.jpgIntense Solar Activity on the Sun: Sunspot 1112 and Solar Flares72 visiteImage of Sunspot Region 1112 (dated October, 18. 2010) as it continues to rotate towards the South Eastern Rim of the Sun.MareKromium
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The_Sun-489332main_euvfilament-20101016-4.jpgIntense Solar Activity on the Sun: Sunspot 1112 and Solar Flares71 visitePartial Filament Eruption.MareKromium
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The_Sun-Coronal_Hole.jpgCoronal Hole58 visiteCaption NASA:"The dark expanse below the Equator of the Sun is a Coronal Hole, such as a Low Density Region extending above the surface, where the Solar Magnetic Field opens freely into interplanetary space.
Shown in false color, the picture was recorded on September 19th, 2007, in Extreme Ultraviolet Light by the EIT instrument onboard the space-based SOHO observatory. Studied extensively from space since the 1960s in ultraviolet and x-ray light, Coronal Holes are known to be the source of the high-speed Solar Wind, atoms and electrons that flow outward along the open magnetic field lines.
The Solar Wind streaming from this coronal hole triggered colorful auroral displays on planet Earth begining late last week, enjoyed by spaceweather watchers at high latitudes".MareKromium
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The_Sun-PIA09320.jpgFull Disk Image of the Sun (March 26, 2007)58 visitenessun commentoMareKromium
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The_Sun-PIA09321.jpgDisk Image of the Sun, March 26, 2007 (Anaglyph)55 visitenessun commentoMareKromium
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The_Sun-PIA09322.jpgClose-up View of an Active Region of the Sun (March 23, 2007)63 visitenessun commentoMareKromium
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The_Sun-PIA09324.jpgCloser View of the Equatorial Region of the Sun (March 24, 2007)54 visitenessun commentoMareKromium
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The_Sun-PIA09328.jpgThe North Pole of the Sun59 visiteNASA's Solar TErrestrial RElations Observatory (STEREO) satellites have provided the first three-dimensional images of the Sun. For the first time, scientists will be able to see structures in the Sun's atmosphere in 3D.
The new view will greatly aid scientists' ability to understand solar physics and thereby improve space weather forecasting.
The EUVI imager is sensitive to wavelengths of light in the extreme ultraviolet portion of the spectrum.
EUVI bands at wavelengths of 304, 171 and 195 Angstroms have been mapped to the red blue and green visible portion of the spectrum; and processed to emphasize the temperature difference of the solar material.
In this picture, a large spicule can be seen. MareKromium
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The_Sun-PIA09330.jpgThe South Pole of the Sun66 visiteSTEREO, a two-year mission, launched October 2006, will provide a unique and revolutionary view of the Sun-Earth System. The two nearly identical observatories -- one ahead of Earth in its orbit, the other trailing behind -- will trace the flow of energy and matter from the Sun to Earth. They will reveal the 3D structure of coronal mass ejections; violent eruptions of matter from the sun that can disrupt satellites and power grids, and help us understand why they happen. STEREO will become a key addition to the fleet of space weather detection satellites by providing more accurate alerts for the arrival time of Earth-directed solar ejections with its unique side-viewing perspective. MareKromium
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The_Sun-PIA09331.jpgThe South Pole of the Sun53 visiteThis image is a composite of left and right eye color image pairs taken by the SECCHI Extreme UltraViolet Imager (EUVI) mounted on the STEREO-B and STEREO-A Spacecraft.
STEREO-B is located behind the Earth, and follows the Earth in orbit around the Sun, This location enables us to view the Sun from the position of a virtual left eye in space.
STEREO-A is located ahead of the Earth, and leads the Earth in orbit around the Sun, This location enables us to view the Sun from the position of a virtual right eye in space.
The EUVI imager is sensitive to wavelengths of light in the extreme ultraviolet portion of the spectrum.
EUVI bands at wavelengths of 304, 171 and 195 Angstroms have been mapped to the red blue and green visible portion of the spectrum and processed to emphasize the three-dimensional structure of the solar material.MareKromium
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The_Sun-PIA09332.jpgLeft Limb of North Pole of the Sun (March 20, 2007)53 visitenessun commentoMareKromium
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The_Sun-SS-HST.jpgThe Sun, Atlantis and Hubble54 visiteCaption NASA, da "NASA - Picture of the Day" del giorno 16 Maggio 2009:"On Wednesday, May 13th 2009, two, tiny, fast moving spots crossed an otherwise featureless Solar Disk. Not Sunspots though, the dark blemishes were silhouettes of the shuttle orbiter Atlantis and the Hubble Space Telescope side by side.
To record this sharp picture of the orbiting pair against the face of the Sun, astronomer Thierry Legault carefully set up his camera and telescope near the center of a 5 Km wide path of visibility about 100 Km South of Kennedy Space Center in Florida. He opened the shutter for 1/8000th second at 12:17 EDT, catching Atlantis and Hubble at a range of 600 Km while they were moving at a relative speed of about 7 Km-per-second.
The total duration of the transit (Sun crossing) was 0,8". Atlantis (top) is approaching Hubble prior to capturing the space telescope. Thursday (May 14, 2009), Astronauts began a series of spacewalks to perform the maintenance as part of the final mission to Hubble".MareKromium
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