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Abell 4067 shows collision of two galaxy clusters

The catalogues of celestial objects contain a galaxy cluster called 'Abell 4067'. Recent observations with the XMM-Newton space observatory, however, reveal evidence that this object actually constitutes of the merger of two clusters. The smaller system appears to be losing the greater part of its gas.

Jan 16th, 2015

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Galactic 'hailstorm' in the early universe

Astronomers have looked back nearly 13 billion years, when the Universe was less than 10 percent its present age, to determine how quasars - extremely luminous objects powered by supermassive black holes with the mass of a billion suns - regulate the formation of stars and the build-up of the most massive galaxies.

Jan 16th, 2015

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Novel vision of the death of massive stars

An international consortium has published in a single article a compendium of data obtained after the simultaneous research of three supernovas and of their corresponding Gamma-Ray Bursts (GRB). The research enabled contrasting statistically that the supernovas associated with GRB emit greater quantities of nickel compared to those not linked to GRB.

Jan 8th, 2015

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Volunteer 'Disk Detectives' top 1 million classifications of possible planetary habitats

A NASA-sponsored website designed to crowdsource analysis of data from the agency's Wide-field Infrared Survey Explorer (WISE) mission has reached an impressive milestone. In less than a year, citizen scientists using DiskDetective.org have logged 1 million classifications of potential debris disks and disks surrounding young stellar objects (YSO). This data will help provide a crucial set of targets for future planet-hunting missions.

Jan 7th, 2015

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'Iron Sun' is not a rock band, but a key to how stars transmit energy

Working at temperatures matching the interior of the sun, researchers at Sandia National Laboratories' Z machine have been able to determine experimentally, for the first time, iron's role in inhibiting energy transmission from the center of the sun to near the edge of its radiative band - the section of the solar interior between the sun's core and outer convection zone.

Jan 6th, 2015

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Milky Way core drives wind at 2 million miles per hour

At a time when our earliest human ancestors had recently mastered walking upright, the heart of our Milky Way galaxy underwent a titanic eruption, driving gases and other material outward at 2 million miles per hour. Now, at least 2 million years later, astronomers are witnessing the aftermath of the explosion: billowing clouds of gas towering about 30,000 light-years above and below the plane of our galaxy.

Jan 6th, 2015

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Super-Earths have long-lasting oceans

For life as we know it to develop on other planets, those planets would need liquid water, or oceans. Geologic evidence suggests that Earth's oceans have existed for nearly the entire history of our world. But would that be true of other planets, particularly super-Earths? New research suggests the answer is yes and that oceans on super-Earths, once established, can last for billions of years.

Jan 5th, 2015

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Stars' spins reveal their ages

When you're a kid every birthday is cause for celebration, but as you get older they become a little less exciting. You might not want to admit just how old you are. And you might notice yourself slowing down over the years. You're not alone - the same is true of stars. They slow down as they age, and their ages are well-kept secrets. Astronomers are taking advantage of the first fact to tackle the second and tease out stellar ages.

Jan 5th, 2015

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