zeyad talaat hegazy

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APOD: Molecular Cloud Barnard 68 (2014 Dec 14) Image Credit: FORS Team, 8.2-meter VLT Antu, ESO http://apod.nasa.gov/apod/ap141214.html Explanation: Where did all the stars go? What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud. Here, a high concentration of dust and molecular gas absorb practically all the visible light emitted from background stars. The eerily dark surroundings help make the interiors of molecular clouds some of the coldest and most isolated places in the universe. One of the most notable of these dark absorption nebulae is a cloud toward the constellation Ophiuchus known as Barnard 68, pictured above. That no stars are visible in the center indicates that Barnard 68 is relatively nearby, with measurements placing it about 500 light-years away and half a light-year across. It is not known exactly how molecular clouds like Barnard 68 form, but it is known that these clouds are themselves likely places for new stars to form. In fact, Barnard 68 itself has been found likely to collapse and form a new star system. It is possible to look right through the cloud in infrared light. http://www.eso.org/sci/facilities/paranal/instruments/fors.html http://www.eso.org/projects/vlt/ http://www.eso.org/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=141214 #APOD

US launches new surveillance satellite

US launches new satellite to collect high-resolution images of the earth<p>An unmanned Atlas 5 rocket blasted off from Vandenberg Air Force Base in California on Wednesday to put a sharp-eyed, <b>Earth-watching satellite into orbit</b> for remote sensing company DigitalGlobe.<p>The 188-foot tall booster lifted …

Great Venus and Jupiter conjunction of 2014

Venus and Jupiter are the brightest planets! Look east before dawn … closest planet-planet conjunction of 2014 August 18. Dazzling near moon August …

Astronomy