| Ultimi arrivi - The Sun: just a star, like many others... |
A-The_Sun-SOHO-LASCO-2.gifA Day of the Sun (a GIF-Movie by Dr Gianluigi Barca - Lunexit Team)90 visitenessun commentoMareKromiumFeb 03, 2011
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The_Sun-Spicules.jpgSpiculae in Solar Region 1109281 visiteCaption NASA:"Imagine a pipe as wide as a state and as long as the Earth. Now imagine that this pipe is filled with hot gas moving 50.000 Km per hour. Further imagine that this pipe is not made of metal but a transparent Magnetic Field. You are envisioning just one of thousands of young Spicules (Spiculae) on the active Sun.
Pictured above is one of the highest resolution image yet of these enigmatic Solar Flux Tubes. Spicules line the above frame of SAR 11092 that crossed the Sun last month, but are particularly evident converging on the Sunspot on the lower right.
Time-sequenced images have recently shown that Spicules last about five minutes, starting out as tall tubes of rapidly rising gas but eventually fading as the gas peaks and falls back down to the Sun. What determines the creation and dynamics of Spicules still remains a topic of the active Solar Research".MareKromiumNov 03, 2010
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The_Sun-489332main_euvfilament-20101016-0.jpgIntense Solar Activity on the Sun: Sunspot 1112 and Solar Flares71 visitenessun commentoMareKromiumOtt 25, 2010
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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.MareKromiumOtt 25, 2010
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The_Sun-489332main_euvfilament-20101016-1.jpgIntense Solar Activity on the Sun: Sunspot 1112 and Solar Flares76 visiteOn Saturday, October 16, 2010, NASA’s Solar Dynamics Observatory captured this stunning image of one of the most intense, Solar Flares seen in the past few months. So far there have been no reports of energetic particles from this M-class Flare interfering with NASA Spacecraft or making their way to Earth.MareKromiumOtt 25, 2010
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The_Sun-489332main_euvfilament-20101016-2.jpgIntense Solar Activity on the Sun: Sunspot 1112 and Solar Flares73 visiteOctober 16, 2010 - Fast-growing sunspot 1112 is crackling with solar flares. The three strongest of this 24 hour period: an M3-flare at 1910 UT on Oct. 16th, a C1-flare at 0900 UT and another C1-flare at 1740 UT on Oct. 17th. So far, none of the blasts has hurled a substantial CME (Coronal Mass Ejection) toward Earth.
In addition, a vast Filament of Magnetism is cutting across the Sun's Southern Hemisphere, measuring about 400.000 Km. A bright 'hot spot' just North of the Filament's midpoint is UV radiation from Sunspot 1112.
The proximity is no coincidence; the filament appears to be rooted in the Sunspot below. If the Sunspot flares, it could cause the entire structure to erupt. But so far, none of the Flares has destabilized the Filament.MareKromiumOtt 25, 2010
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The_Sun-489332main_euvfilament-20101016-4.jpgIntense Solar Activity on the Sun: Sunspot 1112 and Solar Flares72 visitePartial Filament Eruption.MareKromiumOtt 25, 2010
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Solar_Prominence-SOHO.jpgSolar Prominence103 visiteCaption NASA:"What's that coming over the edge of the Sun? What might appear at first glance to be some sort of Sun monster is actually a Solar Prominence. The above Prominence, captured by the Sun-orbiting SOHO satellite earlier this year during an early stage of its eruption, rapidly became one of the largest ever on record.
Even as pictured, the Prominence is huge -- the Earth would easily fit inside. A Solar Prominence is a thin cloud of Solar Gas held just above the Surface by the Sun's Magnetic Field.
A "Quiescent Prominence" typically lasts about a month, while an "Eruptive Prominence" like the one developing above may erupt within hours into a Coronal Mass Ejection (CME), expelling hot gas into the Solar System. Although very hot, Prominences typically appear dark when viewed against the Sun, since they are slightly cooler than the surface. As our Sun evolves toward Solar maximum over the next three years, more large eruptive prominences are expected".MareKromiumOtt 19, 2010
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Solar_Corona~0.jpgDeep Coronal Holes107 visiteCaption NASA:"This ominous, dark shape sprawling across the face of the Sun is a Coronal Hole -- a low density region extending above the Surface where the Solar Magnetic Field opens freely into interplanetary space.
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 (such as atoms and electrons which flow outward along the open Magnetic Field lines). During periods of low activity, Coronal Holes typically cover regions just above the Sun's Poles.
But this extensive Coronal Hole dominated the Sun's Northern Hemisphere earlier this week, captured here in Extreme UV Light by cameras onboard the Solar Dynamics Observatory. The solar wind streaming from this Coronal Hole triggered auroral displays on Earth".MareKromiumAgo 29, 2010
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Sun_Spot.jpgA really beautiful and DEEP SunSpot85 visitenessun commentoMareKromiumAgo 29, 2010
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Solar_Corona-TSE2010_JLD4.jpgThe "Crown" of the Sun66 visiteDalla Rubrica "NASA - Picture of the Day" del giorno 21 Luglio 2010:"During a total Solar Eclipse, the Sun's extensive Outer Atmosphere, or Corona, is an inspirational sight. Subtle shades and shimmering features that engage the eye span a brightness range of over 10,000 to 1, making them notoriously difficult to capture in a single photograph.
But this composite of 7 consecutive digital images over a range of exposure times comes close to revealing the Crown of the Sun in all its glory. The telescopic views were recorded from the Isla de Pascua (Easter Island) during July, 11th, 2010 Total Solar Eclipse and also show solar prominences extending just beyond the edge of the eclipsed Sun.
Remarkably, features on the dim, Near Side of the New Moon can also be made out, illuminated by Sunlight reflected from a Full Earth".MareKromiumLug 27, 2010
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Athmosferic_Corona-Schneider.jpgDiamond Ring and Shadow Bands67 visiteDalla Rubrica "NASA - Picture of the Day" del giorno 24 Luglio 2010:"As the total phase of July ,11th, 2010 Solar Eclipse came to an end, Sunlight streaming past the edge of the Moon's silhouette created the fleeting appearance of a glistening Diamond Ring in the sky.
Seen through a thin cloud layer from the French Polynesian atoll of Hao it also produced remarkable Shadow Bands, flickering across the dramatic scene. Projected onto the cloud layer, the Shadow Bands are parallel to the sliver of Sunlight emerging from behind the Moon's edge.
Caused by turbulence in Earth's Atmosphere refracting the sliver of Sunlight, the narrow bands were captured in this brief, 1/400th second exposure. Shining through the cloud droplets, the Sunlight also produced a luminous atmospheric corona, not to be confused with the Solar Corona seen during Eclipse Totality.
The Atmospheric Corona is centered on the bright diamond of emerging Sunlight".MareKromiumLug 27, 2010
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