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Chemical fingerprints of ancient supernovae found

A search of nearby galaxies for their oldest stars has uncovered two stars in the Sculptor dwarf galaxy that were born shortly after the galaxy formed, approximately 13 billion years ago. The unusual chemical content of the stars may have originated in a single supernova explosion from the first generation of Sculptor stars.

Posted: Mar 23rd, 2015

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Black holes and the dark sector explained by quantum gravity

A quantum version of General relativity demonstrates that Dark Energy and Dark Matter are different manifestations of gravity. The theory calculates the precise value of the cosmological constant, derives the baryonic Tully-Fisher relation, gives a quantum description of Black Holes and calculates the baryonic mass content of the observable universe.

Posted: Mar 20th, 2015

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Planets in the habitable zone around most stars, calculate researchers

Astronomers have discovered thousands of exoplanets in our galaxy, the Milky Way, using the Kepler satellite and many of them have multiple planets orbiting the host star. By analysing these planetary systems, researchers have calculated the probability for the number of stars in the Milky Way that might have planets in the habitable zone. The calculations show that billions of the stars in the Milky Way will have one to three planets in the habitable zone, where there is the potential for liquid water and where life could exist.

Posted: Mar 18th, 2015

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Second natural quasicrystal found in ancient meteorite

Researchers have discovered a quasicrystal - so named because of its unorthodox arrangement of atoms - in a 4.5-billion-year-old meteorite from a remote region of northeastern Russia, bringing to two the number of natural quasicrystals ever discovered.

Posted: Mar 16th, 2015

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Time lapse snapshots of a nova's fading light

Scientists have, for the first time, examined a detailed 'time lapse' X-ray image of the expansion of a classical nova explosion using the GK Persei nova - a binary star system which underwent a nova explosion in 1901.

Posted: Mar 16th, 2015

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New clues from the dawn of the solar system

Sulfide chondrules, a new type of building blocks discovered in meteorites left over from the solar system's infancy, provide evidence for a previously unknown region in the protoplanetary disk that gave rise to the planets including Earth.

Posted: Mar 16th, 2015

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NASA spacecraft in Earth's orbit, preparing to study magnetic reconnection

Following a successful launch at 10:44 p.m. EDT Thursday, NASA's four Magnetospheric Multiscale (MMS) spacecraft are positioned in Earth's orbit to begin the first space mission dedicated to the study of a phenomenon called magnetic reconnection. This process is thought to be the catalyst for some of the most powerful explosions in our solar system.

Posted: Mar 13th, 2015

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Electrospray thruster makes small satellites more capable

A MIT spinout has developed a commercial electrospray propulsion system - their first is about the size of a pack of gum - made of tiny chips that provide thrust for small satellites. Among other advantages, this module can be manufactured for significantly less than today's alternatives.

Posted: Mar 12th, 2015

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