Astronomers report tremendous quantities of warm dusty debris surrounding a star with luminosity and mass similar to the suns, but located 300 light-years from Earth. The extraordinary nature of the dust indicates a violent history of cosmic collisions between asteroids and comets, or perhaps even between planets. The discovery is published July 21 in Nature.
"What is so amazing is that the amount of dust around this star is approximately 1 million times greater than the dust around the sun," said Eric Becklin, a UCLA professor of physics and astronomy, member of NASAs Astrobiology Institute, and co-author of the Nature paper. "Its likely there was a cosmic catastrophe, and a time of heavy bombardment, where large asteroids collided in the last few thousand years or less. Its incredible what must be going on."
Unlike hundreds of other stars with dust, where the dust is far from the star -- equivalent to beyond the orbit of Pluto -- this dust is orbiting in close to the star, where Earth-like planets are most likely to be, said Inseok Song, a former UCLA research scientist who is now an astronomer with the Gemini Observatory in Hawaii, and lead author of the paper.
Stuart Wolpert | EurekAlert!
Unraveling the nature of 'whistlers' from space in the lab
15.08.2018 | American Institute of Physics
Early opaque universe linked to galaxy scarcity
15.08.2018 | University of California - Riverside
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
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Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
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Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
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Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur
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16.08.2018 | Earth Sciences
16.08.2018 | Life Sciences