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The hot blue stars of Messier 47

This spectacular image of the star cluster Messier 47 was taken using the Wide Field Imager camera, installed on the MPG/ESO 2.2-meter telescope at ESO's La Silla Observatory in Chile. This young open cluster is dominated by a sprinkling of brilliant blue stars but also contains a few contrasting red giant stars.

Posted: Dec 17th, 2014

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Stretched-out solid exoplanets

Astronomers could soon be able to find rocky planets stretched out by the gravity of the stars they orbit, according to a group of researchers.

Posted: Dec 15th, 2014

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Interstellar mystery solved by supercomputer simulations

An interstellar mystery of why stars form has been solved thanks to the most realistic supercomputer simulations of galaxies yet made. Theoretical astrophysicists found that stellar activity - like supernova explosions or even just starlight - plays a big part in the formation of other stars and the growth of galaxies.

Posted: Dec 11th, 2014

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Rosetta findings fuel debate on origin of Earth's water

First measurements by the Rosetta mission's ROSINA instrument show that the deuterium-to-hydrogen (D/H) ratio of the comet 67P/Churyumov-Gerasimenko is highly enriched in deuterium. These results contradict the theory that the water present in the Earth's atmosphere and oceans has a cometary origin.

Posted: Dec 11th, 2014

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The first X-ray diffraction measurements on Mars

In 2012 the Mars Science Laboratory landed in the fascinating Gale crater. The Gale crater is of such great interest because of the 5.5 km high mountain of layered materials in the middle. This material tells an intricate story of the history of Mars, perhaps spanning much of the existence of this mysterious planet.

Posted: Dec 8th, 2014

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