National Radio Astronomy Observatory (NRAO) 26 Feb 2018, 13:50 UTC Space weather emitted by Proxima Centauri, the star closest to our sun, may make that system rather inhospitable to life after all. Using data from the Atacama Large Millimeter/submillimeter Array (ALMA), a team of astronomers discovered that a powerful stellar flare erupted from Proxima Centauri last March. This finding, published in the Astrophysical Journal Letters, raises questions about the habitability of our solar system’s nearest exoplanetary neighbor, Proxima b, which orbits Proxima Centauri.
Planetary Science Institute 26 Feb 2018, 07:00 UTC Spacecraft landing on Jupiter’s moon Europa could see the craft sink due to high surface porosity, research by Planetary Science Institute Senior Scientist Robert Nelson shows. Nelson was the lead author of a laboratory study of the photopolarimetric properties of bright particles that explain unusual negative polarization behavior at low phase angles observed for decades in association with atmosphereless bodies including asteroids 44 Nysa, 64 Angelina and the Galilean satellites Io, Europa and Ganymede.
NASA's Goddard Space Flight Center 23 Feb 2018, 17:20 UTC A dramatic magnetic power struggle at the Sun’s surface lies at the heart of solar eruptions, new research using NASA data shows. The work highlights the role of the Sun’s magnetic landscape, or topology, in the development of solar eruptions that can trigger space weather events around Earth.
NASA's Goddard Space Flight Center 23 Feb 2018, 15:31 UTC The NASA/ESA Hubble Space Telescope caught sight of a soft, diffuse-looking galaxy that is probably the aftermath of a long-ago galactic collision. Two spiral galaxies, each perhaps much like the Milky Way, swirled together for millions of years. In such mergers, the original galaxies are often stretched and pulled apart as they wrap around a common center of gravity. After a few back-and-forths, this starry tempest settles down into a new, round object. The now subdued celestial body, cataloged as SDSS J162702.56+432833.9, is technically known as an elliptical galaxy.
NASA's Jet Propulsion Laboratory News and Features 22 Feb 2018, 19:09 UTC NASA has a long and successful track record at Mars. Since 1965, it has flown by, orbited, landed and roved across the surface of the Red Planet. What can InSight -- planned for launch in May -- do that hasn't been done before?
Kavli Institute for the Physics and Mathematics of the Universe 22 Feb 2018, 05:00 UTC The moment a supernova becomes visible in the sky has been captured by an amateur astronomer, and has helped an international team of researchers validate theoretical predictions about the initial evolution of such stellar explosions.
Keck Observatory 21 Feb 2018, 23:00 UTC Astronomers have the “all-clear” for an exciting test of Einstein’s Theory of General Relativity, thanks to a new discovery about S0-2’s star status. Up until now, it was thought that S0-2 may be a binary, a system where two stars circle around each other. Having such a partner would have complicated the upcoming gravity test.
Keck Observatory 21 Feb 2018, 18:00 UTC Thanks to lucky snapshots taken by an amateur astronomer in Argentina, scientists have obtained their first view of the initial burst of light from the explosion of a massive star. During tests of a new camera, Víctor Buso captured images of a distant galaxy before and after the supernova's "shock breakout" – when a supersonic pressure wave from the exploding core of the star hits and heats gas at the star’s surface to a very high temperature, causing it to emit light and rapidly brighten.