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Space Exploration News

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astrophysics, cosmology, the universe...

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Search for habitable planets should be more conservative

Scientists should take the conservative approach when searching for habitable zones where life-sustaining planets might exist, according to James Kasting, Evan Pugh Professor of Geosciences at Penn State, including when building terrestrial planet finders.

Posted: Nov 26th, 2013

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Galaxy groups running out of fuel

Astronomers at Swinburne University of Technology and their international collaborators have found evidence that galaxies that are located in groups might be running out of gas.

Posted: Nov 26th, 2013

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Mach 1000 shock wave lights supernova remnant

When a star explodes as a supernova, the material blasted outward from the explosion still glows hundreds or thousands of years later, forming a picturesque supernova remnant. What powers such long-lived brilliance? In the case of Tycho's supernova remnant, astronomers have discovered that a reverse shock wave racing inward at Mach 1000 (1,000 times the speed of sound) is heating the remnant and causing it to emit X-ray light.

Posted: Nov 25th, 2013

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NASA sees 'watershed' cosmic blast in unique detail

On April 27, a blast of light from a dying star in a distant galaxy became the focus of astronomers around the world. The explosion, known as a gamma-ray burst and designated GRB 130427A, tops the charts as one of the brightest ever seen. A trio of NASA satellites, working in concert with ground-based robotic telescopes, captured never-before-seen details that challenge current theoretical understandings of how gamma-ray bursts work.

Posted: Nov 21st, 2013

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Racing particles from space

For the first time scientists have uncovered concrete evidence for highly energetic neutrinos stemming from outside our solar system. The IceCube experiment, a huge neutrino detector in Antarctica, has observed 28 neutrinos that most likely stem from cosmic objects such as supernovae, black holes, pulsars or other extreme cosmic phenomena.

Posted: Nov 21st, 2013

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Infant galaxies merging near 'cosmic dawn'

Astronomers using the combined power of the Atacama Large Millimeter/submillimeter Array (ALMA) telescope and NASA's Hubble Space Telescope have discovered a far-flung trio of primitive galaxies nestled inside an enormous blob of primordial gas nearly 13 billion light-years from Earth.

Posted: Nov 21st, 2013

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NASA's Chandra helps confirm evidence of jet in Milky Way's black hole

Astronomers have long sought strong evidence that Sagittarius A*, the supermassive black hole at the center of the Milky Way, is producing a jet of high-energy particles. Finally they have found it, in new results from NASA's Chandra X-ray Observatory and the National Science Foundation's Very Large Array radio telescope.

Posted: Nov 20th, 2013

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Winged comet

New images of ISON indicate that the comet has lost individual fragments.

Posted: Nov 20th, 2013

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