astro-news from Institute of Astronomy Library in Inoreader
Near Miss: The Solar Superstorm of July 2012 »
posted at 01:34:00 UTC via Science @ NASA
Two years ago today, a historic solar storm narrowly missed Earth, prompting forecasters to revise the odds of future impacts.
NASA's Chandra X-ray Observatory Celebrates 15th Anniversary »
posted on Jul 22 2014 16:00:00 UTC via NASA Breaking News
Fifteen years ago, NASA's Chandra X-ray Observatory was launched into space aboard the Space Shuttle Columbia. Since its deployment on July 23, 1999, Chandra has helped revolutionize our understanding of the universe through its unrivaled X-ray vision.
Hubble:Hubble traces the halo of a galaxy more accurately than ever before [heic1415] »
posted on Jul 21 2014 15:44:00 UTC via ESA Science & Technology: Home page
Astronomers using the NASA/ESA Hubble Space Telescope have probed the extreme outskirts of the stunning elliptical galaxy Centaurus A. The galaxy's halo of stars has been found to extend much further from the galaxy's centre than expected and the stars within this halo seem to be surprisingly rich in heavy elements. This is the most remote portion of an elliptical galaxy ever to have been explored.
New alien world has longest year »
posted on Jul 22 2014 11:04:54 UTC via BBC News | Science & Environment | World Edition
Astronomers in the US have discovered a distant world with the longest year of any planet outside our Solar System.
Galaxy mapper's first discovery: surprise space debris »
posted on Jul 21 2014 14:57:00 UTC via Science news and science jobs from New Scientist - New Scientist
The Gaia satellite is being hit by far more micrometeoroids than anticipated, which might spell trouble for spacecraft headed to the same orbital position






Rosetta Comet May Be a Contact Binary »
posted on Jul 17 2014 18:05:30 UTC via Science @ NASA
New images of Comet 67P/Churyumov-Gerasimenko, the target of ESA's Rosetta probe, show that 67P is no ordinary comet.
UK space shot's tribute to Newton »
posted on Jul 17 2014 16:41:33 UTC via BBC News | Science & Environment | World Edition
British astronaut Tim Peake has picked "Principia" to be the name of his mission into space next year.
Rosetta:The dual personality of comet 67P/C-G »
posted on Jul 17 2014 12:56:00 UTC via ESA Science & Technology: Home page
This week's images of comet 67P/Churyumov-Gerasimenko reveal an extraordinarily irregular shape. We had hints of that in last week's images and in the unscheduled previews that were seen a few days ago, and in that short time it has become clear that this is no ordinary comet. Like its name, it seems that comet 67P/C-G is in two parts.
Rosetta heads for 'space duck' »
posted on Jul 17 2014 13:14:57 UTC via BBC News | Science & Environment | World Edition
Europe's mission to land on a comet was always going to be difficult, but the pictures released this week of the giant ice ball illustrate just how daunting the task will be.
Strange dark stuff is making the universe too bright »
posted on Jul 17 2014 09:00:00 UTC via Science news and science jobs from New Scientist - New Scientist
Sky surveys suggest that dark matter or some other mysterious dark material may be lighting up the universe with too much ultraviolet radiation






Planetary science: Titan's sea is super salty »
posted on Jul 16 2014 00:00:00 UTC via Nature

Planetary science: Titan's sea is super salty

Nature 511, 7509 (2014). doi:10.1038/511266b

Saturn's largest moon, Titan, has a buried ocean that is saltier than many seas on Earth.Titan, with its thick atmosphere and bodies of surface liquid, is of great interest to scientists looking for life beyond Earth. A team led by Giuseppe Mitri, of the

A deep crust–mantle boundary in the asteroid 4 Vesta »
posted on Jul 16 2014 00:00:00 UTC by Harold Clenet via Nature

A deep crust–mantle boundary in the asteroid 4 Vesta

Nature 511, 7509 (2014). doi:10.1038/nature13499

Authors: Harold Clenet, Martin Jutzi, Jean-Alix Barrat, Erik I. Asphaug, Willy Benz & Philippe Gillet

The asteroid 4 Vesta was recently found to have two large impact craters near its south pole, exposing subsurface material. Modelling suggested that surface material in the northern hemisphere of Vesta came from a depth of about 20 kilometres, whereas the exposed southern material comes from a depth of 60 to 100 kilometres. Large amounts of olivine from the mantle were not seen, suggesting that the outer 100 kilometres or so is mainly igneous crust. Here we analyse the data on Vesta and conclude that the crust–mantle boundary (or Moho) is deeper than 80 kilometres.

Astrophysics: Survival of the largest »
posted on Jul 09 2014 00:00:00 UTC by Haley Gomez via Nature

Astrophysics: Survival of the largest

Nature 511, 7509 (2014). doi:10.1038/nature13640

Authors: Haley Gomez

Whether supernovae create most of the dust in the cosmos is a controversial question. Observations of a distant supernova have revealed signs of freshly formed dust, but the properties of the dust are unexpected. See Letter p.326

Rapid formation of large dust grains in the luminous supernova 2010jl »
posted on Jul 09 2014 00:00:00 UTC by Christa Gall via Nature

Rapid formation of large dust grains in the luminous supernova 2010jl

Nature 511, 7509 (2014). doi:10.1038/nature13558

Authors: Christa Gall, Jens Hjorth, Darach Watson, Eli Dwek, Justyn R. Maund, Ori Fox, Giorgos Leloudas, Daniele Malesani & Avril C. Day-Jones

The origin of dust in galaxies is still a mystery. The majority of the refractory elements are produced in supernova explosions, but it is unclear how and where dust grains condense and grow, and how they avoid destruction in the harsh environments of star-forming galaxies. The recent detection of 0.1 to 0.5 solar masses of dust in nearby supernova remnants suggests in situ dust formation, while other observations reveal very little dust in supernovae in the first few years after explosion. Observations of the spectral evolution of the bright SN 2010jl have been interpreted as pre-existing dust, dust formation or no dust at all. Here we report the rapid (40 to 240 days) formation of dust in its dense circumstellar medium. The wavelength-dependent extinction of this dust reveals the presence of very large (exceeding one micrometre) grains, which resist destruction. At later times (500 to 900 days), the near-infrared thermal emission shows an accelerated growth in dust mass, marking the transition of the dust source from the circumstellar medium to the ejecta. This provides the link between the early and late dust mass evolution in supernovae with dense circumstellar media.

Epic map reveals Mars's geography in unrivalled detail »
posted on Jul 16 2014 16:00:00 UTC via Science news and science jobs from New Scientist - New Scientist
It took four spacecraft, billions of dollars and 16 years to gather the data for this glorious map of the Red Planet – now you can have it on your wall






SOHO:Comet ISON's dramatic final hours »
posted on Jul 16 2014 13:00:00 UTC via ESA Science & Technology: Home page
A new analysis of data from the ESA/NASA Solar and Heliospheric Observatory (SOHO) spacecraft has revealed that comet 2012/S1 (ISON) stopped producing dust and gas shortly before it raced past the Sun and disintegrated.
Rosetta's target comet is a surprise double space rock »
posted on Jul 16 2014 11:53:00 UTC via Science news and science jobs from New Scientist - New Scientist
Pictures from the European Rosetta probe suggest the comet selected for an attempted landing, Churyumov-Gerasimenko, is actually two icy rocks stuck together






VIDEO: Europa and the hunt for alien life »
posted on Jul 16 2014 00:35:16 UTC via BBC News | Science & Environment | World Edition
The search for life on other planets has long inspired science fiction novelists and Nasa missions but could one of Jupiter's moons, Europa, provide proof?
Rosetta's target is 'double' comet »
posted on Jul 15 2014 17:35:17 UTC via BBC News | Science & Environment | World Edition
Europe's Rosetta probe acquires some sensational new images of its comet quarry, showing what appears to be two distinct parts in contact with each other.
New Horizons Only One Year from Pluto »
posted on Jul 14 2014 23:42:00 UTC via Science @ NASA
NASA's New Horizons spacecraft is only a year away from Pluto. Researchers are buzzing with anticipation as NASA prepares to encounter a new world for the first time in decades.
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