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NASA Image of the day |
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NASA Image of the Day
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The latest NASA "Image of the Day" image.
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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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Recent Science Stories
digg.com: Top News
Bill Gates: The End of Textbooks as We Know Them
Friday, 03 September 2010 10:19An Afternoon of Conversation engages big thinkers and doers in serious discussion
about their work and the future.This conversation features Bill Gates and Walter Isaacson. Turds or Curds: Which Fairground Droppings Best Convert to Energy?
Friday, 03 September 2010 07:59Which waste is the best to convert to energy -- animal dung or leftover funnel cakes, corn dogs, cotton candy and other fairground favorites? That's what a Midwest scientist and a group of researchers are exploring at the Minnesota State Fair. House Built From Hemp Is Full Of Green Surprises
Thursday, 02 September 2010 23:36All images from Push House
In much of the world, hemp is thought of as a useful building material; Warren recently showed us an interesting house from Australia and it is common in the UK. But in America, it is still the butt of hippie jokes; Matt Hickman of the Mother Nature Networks describes a new house in Asheville, North Carolina with references to Tommy Chong and describes the interior: "there's not a blacklight poster, hanging spider plant, or crumpled up Cheetos bag in sight." Discovery News says "Put aside old visions of burlap-like shirts that belong with hacky sacks." Even the owner tells CNN ""We heard that we could have a really great neighborhood party if it ever caught on fire."
It's a shame that everyone is focusing on that, because it is just one interesting product in a fascinating house that is full of surprises.... Read the full story on TreeHugger
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