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08/11/09
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September 5, 2010, 11:12 AM
Mostly sunny19°Creal feel: 19°Ccurrent pressure: 1008 mbhumidity: 74%wind speed: 6 m/s SWwind gusts: 6 m/ssunrise: 6:42sunset: 19:44Forecast September 6, 2010day
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Fun Facts
The highest point in Pennsylvania is lower than the lowest point in Colorado.Word of the day
What does I was hoodwinked mean?Other wordsa) I was totally in love b) I was cleverly tricked c) I was highly entertained Ephemeris
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26 days oldNASA Pic of the Day.
A Chameleon Sky
The sands of time are running out for the central star of this the Hourglass Nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a sun-like star's life occurs as its outer layers are ejected and its core becomes a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green, and oxygen-blue) outline the tenuous walls of the 'hourglass.' The unprecedented sharpness of Hubble's images revealed surprising details of the nebula ejection process and may resolve the outstanding mystery of the variety of complex shapes and symmetries of planetary nebulae. Image Credit: NASA, WFPC2, HST, R. Sahai and J. Trauger (JPL)
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