Датотека:NASA-14090-Comet-C2013A1-SidingSpring-Hubble-20140311.jpg

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Opis	English: March 27, 2014 RELEASE 14-090 http://www.nasa.gov/press/2014/march/nasas-hubble-space-telescope-spots-mars-bound-comet-sprout-multiple-jets NASA's Hubble Space Telescope Spots Mars-Bound Comet Sprout Multiple Jets Comet C/2013 A1 as seen by NASA's Hubble Space Telescope The images above show -- before and after filtering -- comet C/2013 A1, also known as Siding Spring, as captured by Wide Field Camera 3 on NASA's Hubble Space Telescope. NASA released Thursday an image of a comet that, on Oct. 19, will pass within 84,000 miles of Mars -- one third the distance between Earth and our moon. The image on the left, captured March 11 by NASA's Hubble Space Telescope, shows comet C/2013 A1, also called Siding Spring, at a distance of 353 million miles from Earth. Hubble can't see Siding Spring's icy nucleus because of its diminutive size. The nucleus is surrounded by a glowing dust cloud, or COMA, that measures roughly 12,000 miles across. The right image shows the comet after image processing techniques were applied to remove the hazy glow of the coma revealing what appear to be two jets of dust coming off the location of the nucleus in opposite directions. This observation should allow astronomers to measure the direction of the nucleus’s pole, and axis of rotation. Hubble also observed Siding Spring on Jan. 21 as Earth was crossing its orbital plane, which is the path the comet takes as it orbits the sun. This positioning of the two bodies allowed astronomers to determine the speed of the dust coming off the nucleus. "This is critical information that we need to determine whether, and to what degree, dust grains in the coma of the comet will impact Mars and spacecraft in the vicinity of Mars," said Jian-Yang Li of the Planetary Science Institute in Tucson, Arizona. Discovered in January 2013 by Robert H. McNaught at Siding Spring Observatory, the comet is falling toward the sun along a roughly 1 million year orbit and is now within the radius of Jupiter's orbit. The comet will make its closest approach to our sun on Oct. 25, at a distance of 130 million miles – well outside of Earth's orbit. The comet is not expected to become bright enough to be seen by the naked eye. The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency. NASA's Goddard Space Flight Center in Greenbelt, Md., manages the telescope. The Space Telescope Science Institute (STScI) in Baltimore conducts Hubble science operations. STScI is operated for NASA by the Association of Universities for Research in Astronomy, Inc., in Washington. For images and more information about Hubble, visit: http://www.nasa.gov/hubble
Datum	28. mart 2014., 09:48:37
Izvor	http://www.nasa.gov/sites/default/files/14-090-hubble-comet_0.jpg
Autor	NASA, ESA, and J.-Y. Li (Planetary Science Institute)

Licenciranje

	Ова датотека је у јавном власништву зато што је њен аутор НАСА. НАСА-а политика ауторских права наводи „Материјали НАСА-е нису заштићени ауторским правима осим ако није другачије наведено“. (Погледајте Template:PD-USGov, NASA copyright policy page или JPL Image Use Policy.)
	Упозорења: Употреба НАСА-их логотипа и емблема је ограничена Америчким законом 14 CFR 1221. НАСА-ин сајт хостује велики број слика Совјетске/Руске свемирске агенције и других не-Америчких свемирских агенција. Ове слике нису нужно у јавном власништву. Материјали засновани на подацима Хабл телескопа су слободни само ако је њихов аутор STScI.[1] Такође погледајте {{PD-Hubble}} и {{Cc-Hubble}}. Материјали са сонде SOHO су заштићени ауторским правима и потребна је дозвола за комерцијалну употребу. [2] Слике са сајта APOD можда подлежу ауторским правима. [3]