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Discovered Ask a Correspondent – Playing God via widska
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An Odd Planetary Nebula in Hercules
For as long as there been humans we have searched for our place in the cosmos. Where are we? Who are we? We find that we live on an insignificant planet of a hum-drum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people. This perspective is a courageous continuation of our penchant for constructing and testing mental models of the skies; the Sun as a red-hot stone, the stars as a celestial flame, the Galaxy as the backbone of night.
– Carl Sagan, CosmosThe NASA/ESA Hubble Space Telescope has taken a striking high resolution image of the curious planetary nebula NGC 6210. Located about 6500 light-years away, in the constellation of Hercules, NGC 6210 was discovered in 1825 by the German astronomer Friedrich Georg Wilhelm Struve. Although in a small telescope it appears only as a tiny disc, it is fairly bright.
NGC 6210 is the last gasp of a star slightly less massive than our Sun at the final stage of its life cycle. The multiple shells of material ejected by the dying star form a superposition of structures with different degrees of symmetry, giving NGC 6210 its odd shape. This sharp image shows the inner region of this planetary nebula in unprecedented detail, where the central star is surrounded by a thin, bluish bubble that reveals a delicate filamentary structure. This bubble is superposed onto an asymmetric, reddish gas formation where holes, filaments and pillars are clearly visible.
The life of a star ends when the fuel available to its thermonuclear engine runs out. The estimated lifetime for a Sun-like star is some ten billion years. When the star is about to expire, it becomes unstable and ejects its outer layers, forming a planetary nebula and leaving behind a tiny, but very hot, remnant, known as white dwarf. This compact object, here visible at the centre of the image, cools down and fades very slowly. Stellar evolution theory predicts that our Sun will experience the same fate as NGC 6210 in about five billion years.
This picture was created from images taken with Hubble’s Wide Field Planetary Camera 2 through three filters: the broadband filter F555W (yellow) and the narrowband filters F656N (ionised hydrogen), F658N (ionised nitrogen) and F502N (ionised oxygen). The exposure times were 80 s, 140 s, 800 s and 700 s respectively and the field of view is only about 28 arcseconds across.
Credit:
ESA/Hubble and NASA
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via apod.nasa.gov“There are two ways to slide through life: to believe everything or to doubt everything; both save us from thinking.”
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RepubliCorp would like to salute Wisconsin Senator-Designate Ron Johnson™ for fully representing the richest 2% of Wisconsin and America – we are honored to name him Employee Of The Month for our Wisconsin branch.
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Bill Maher thinks the Democrats need their own wedge issue if they want to stay in power in 2012, legalizing marijuana.
http://videocafe.crooksandliars.com/heather/new-rule-democrats-winning-message-yes-we-
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First Lady Michelle Obama speaks about the importance of arts and humanities programs as 15 programs across the country receive awards for fostering the creative and intellectual development of American youth. October 20, 2010.
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In celebration of National Arts and Humanities Month, visual artist Chuck Close, ballet dancer Damian Woetzel, and committee co-chairs Margo Lion and George Stevens, Jr. discuss arts and humanities education and the arts.
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President Obama speaks about improving educational opportunities and outcomes for Hispanic students as he signs the Executive Order for the White House Initiative on Educational Excellence for Hispanic Americans. October 19, 2010.
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Austan Goolsbee, Chairman of the Council of Economic Advisers takes your questions, live, during this Tuesday Talk session. October 19, 2010.
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President Obama holds a discussion on ensuring economic stability and opportunity for women in the backyard of the Foss family in Seattle, WA. October 21, 2010.
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The President hones in on the passage of Wall Street Reform over the ferocious lobbying of Wall Street banks as a pivotal moment in the last two years, and condemns Republicans in Congress for vowing to repeal it.
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Gatlinburg Garden Castle Rainbow Tower Library Imagination Station Temple Water Spirit Guardian Labyrinth Treasury Magic Healing 