In Awe of God’s Creation – NASA ne arata cum cometa ISON se apropie de soare – ISON comet filmed by NASA – Coplesit de Creatia lui Dumnezeu

Photo credit http://apod.nasa.gov a 23 second trajectory
Cometa Ison apare in partea stanga, jos,
in aceasta filmare de 23 de secunde.
Daca cometa ISON nu va fi distrusa de caldura soarelui,
va fi vizibila pe pamant, cu ochiul liber (fara telescop),
pe data de 28 noiembrie 2013.

Explanation: Still intact, on November 21 Comet ISON (C/2012 S1) swept into this animated field of view (left) from the HI-1 camera on the STEREO-A spacecraft. The camera has also captured periodic Comet Encke, Mercury, and Earth, with the Sun cropped out of the frame at the right, the source of the billowing solar wind. From STEREO’s perspective in interplanetary space, planet Earth is actually the most distant of the group, seen in its orbit beyond the Sun. Mercury is closest, but both planets are still so bright they create sharp vertical lines in the camera’s detector. Both comets clearly sport substantial tails, but ISON is closer to the camera and will continue to move more rapidly through the field. Cameras on STEREO and SOHO spacecraft will be able to follow Comet ISON as it falls towards its close encounter with the Sun on November 28, even as ISON gets more difficult to see in the bright dawn skies of planet Earth.

Photo credit http://www.foxnews.com

ROMANIAN

Dailymail.co.uk via  Descopera.ro – ISON, supranumită „cometa secolului”, care poate fi văzută cu ochiul liber în această perioadă, oferă pasionaţilor de astronomie imagini spectaculoase, însă ar putea să se fragmenteze şi să explodeze în zilele viitoare, pe măsură ce se apropie tot mai mult de Soare. Sâmbătă, experţii au anunţat că ISON a intrat în „modul complet de erupţie”, după ce gradul ei de strălucire a crescut spectaculos în doar 24 de ore. Oamenii de ştiinţă sunt de părere că ISON va deveni şi mai strălucitoare în săptămânile următoare. ISON poate fi urmărită cel mai bine pe un cer întunecat, când linia orizontului nu este obturată, din zonele rurale.

VIDEO by NASA Goddard

NASA Comet ISON’s Path Thru the Solar System
Traiectoria lui ISON prin sistemul solar

Comet C/2012 S1 (ISON) may become one of the most dazzling in decades when it rounds the sun later this year. Like all comets, ISON is a clump of frozen gases mixed with dust. Often described as „dirty snowballs,” comets emit gas and dust whenever they venture near enough to the sun that the icy material transforms from a solid to gas, a process called sublimation. Jets powered by sublimating ice also release dust, which reflects sunlight and brightens the comet.

Based on ISON’s orbit, astronomers think the comet is making its first-ever trip through the inner solar system. Before beginning its long fall toward the sun, the comet resided in the Oort comet cloud, a vast shell of perhaps a trillion icy bodies that extends from the outer reaches of the planetary system to about a third of the distance to the star nearest the sun.

Formally designated C/2012 S1 (ISON), the comet was discovered on Sept. 21, 2012, by Russian astronomers Vitali Nevski and Artyom Novichonok using a telescope of the International Scientific Optical Network located near Kislovodsk.

The first of several intriguing observing opportunities occurs on Oct. 1, when the inbound comet passes about 6.7 million miles (10.8 million km) from Mars. During this time, the comet may be observable to NASA and ESA spacecraft now working at Mars, including the Curiosity rover.

Fifty-eight days later, on Nov. 28, ISON will make a sweltering passage around the sun. The comet will approach within about 730,000 miles (1.2 million km) of its visible surface, which classifies ISON as a sungrazing comet. In late November, its icy material will furiously sublimate and release torrents of dust as the surface erodes under the sun’s fierce heat, all as sun-monitoring satellites look on. Around this time, the comet may become bright enough to glimpse just by holding up a hand to block the sun’s glare.

Sungrazing comets often shed large fragments or even completely disrupt following close encounters with the sun, but for ISON neither fate is a forgone conclusion.

Following ISON’s solar encounter, the comet will depart the sun and move toward Earth, appearing in evening twilight through December. The comet will swing past Earth on Dec. 26, approaching within 39.9 million miles (64.2 million km) or about 167 times farther than the moon.

VIDEO by ScienceAtNASA  Published on Mar 29, 2013

ISON: Comet of the Century

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