All Posts Tagged With: "Space-Time"
Space-Time “Ripples” Created by Merging Black Holes?
Brian Handwerk
for National Geographic News
March 4, 2009
Two newfound black holes on the verge of crashing into each other could be creating “ripples” in the fabric of space-time, astronomers suggest.
The two supermassive black holes orbit each other about once a century, separated by just a third of a light-year—and they seem to be getting closer, a [...]
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The Center for Naturalism
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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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