Imaginea Astronomica a Zilei

Descopera cosmosul! In fiecare zi este prezentata o noua imagine sau fotografie a universului nostru fascinant, insotita de o explicatie scurta din partea unui astronom profesionist.

2004 March 30
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 the highest resolution version available.

A Prominent Solar Prominence from SOHO
Credit: SOHO - EIT Consortium, ESA, NASA

Explicatie: (Edit) One of the most spectacular solar sights is a prominence. A solar prominence is a cloud of solar gas held above the Sun's surface by the Sun's magnetic field. Last month, NASA's Sun-orbiting SOHO spacecraft imaged an impressively large prominence hovering over the surface, pictured above. The Earth would easily fit under the hovering curtain of hot gas. A quiescent prominence typically lasts about a month, and may erupt in a Coronal Mass Ejection (CME) expelling hot gas into the Solar System. Although somehow related to the Sun's changing magnetic field, the energy mechanism that creates and sustains a Solar prominence is still a topic of research.

Imaginea de maine: cygnus starfield


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Autori & editori: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
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Un serviciu al: LHEA at NASA / GSFC
& Michigan Tech. U.