16 dezembro 2014

W5: Pillars of Star Formation



How do stars form? Images of the star forming region W5 like those in the infrared by NASA's Wide Field Infrared Survey Explorer (WISE) satellite provide clear clues with indications that massive stars near the center of empty cavities are older than stars near the edges. A likely reason for this is that the older stars in the center are actually triggering the formation of the younger edge stars. The triggered star formation occurs when hot outflowing gas compresses cooler gas into knots dense enough to gravitationally contract into stars. In the featured scientifically-colored infrared image, spectacular pillars, left slowly evaporating from the hot outflowing gas, provide further visual clues. W5 is also known as IC 1848, and together with IC 1805 form a complex region of star formation popularly dubbed the Heart and Soul Nebulas. The above image highlights a part of W5 spanning about 2,000 light years that is rich in star forming pillars. W5 lies about 6,500 light years away toward the constellation of Cassiopeia.



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Sunset Over the Gulf of Mexico



From the International Space Station, Expedition 42 Flight Engineer Terry W. Virts took this photograph of the Gulf of Mexico and U.S. Gulf Coast at sunset and posted it to social media on Dec. 14, 2014. The space station and its crew orbit Earth from an altitude of 220 miles, traveling at a speed of approximately 17,500 miles per hour. Because the station completes each trip around the globe in about 92 minutes, the crew experiences 16 sunrises and sunsets each day. Image Credit: NASA/Terry Virts



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Tim Horton, of Canadian coffee fame, was a professional hockey...





Tim Horton, of Canadian coffee fame, was a professional hockey player, winning 4 Stanley Cups in his career


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December 15th 1939: Gone With The Wind premieres On this day in...



Film poster





Gable (Butler) and Leigh (O'Hara)





Gone With The Wind premiere



December 15th 1939: Gone With The Wind premieres


On this day in 1939 the iconic film ‘Gone With The Wind’ premiered in Atlanta, Georgia, in the United States. It is based on Margaret Mitchell’s 1936 novel and starred Clark Gable and Vivien Leigh. The film tells the epic love story of Rhett Butler (Gable) and Scarlett O’Hara (Leigh) and is set to the backdrop of the American Civil War and postwar Reconstruction in the American South. The film was a commercial success and was critically acclaimed, receiving ten Academy Awards. While some still see it as a great love story, the film has been criticized for its depiction of slavery and attitude towards African-Americans, in particular its defense of the white supremacist Ku Klux Klan during Reconstruction.


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ON THIS DAY IN THE HISTORY OF PSYCHOLOGY (16th December...





ON THIS DAY IN THE HISTORY OF PSYCHOLOGY (16th December 1940)


Robert Resnick was born


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