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Neue Herausforderung für direkte Abbildungen von Exo-Erden

Ein internationales Astronomenteam hat das Very Large Telescope Interferometer (VLTI) bis an seine Grenzen ausgereizt und exozodiakales Licht nahe an der habitablen Zone um neun nahegelegene Sterne entdeckt. Exozodiakales Licht ist Sternlicht, das von Staub reflektiert wird, der aus Kollisionen zwischen Asteroiden und der Verdampfung von Kometen resultiert. Die Anwesenheit so großer Mengen an Staub in den inneren Regionen um einige Sterne könnte in der Zukunft ein Hindernis bei der direkten Abbildung von erdähnlichen Planeten darstellen. (more…)

MSU Research Sheds New Light on Star Clusters, Black Holes

By Guest PostOctober 7, 2012Scienceanil seth, array telescope, astronomer, black hole, density, earth, Environment, Galaxy, globular cluster, gravitational dance, hubble, james miller jones, jay strader, laura chomiuk, light year, m22, messier 22, michigan, Milky Way, new mexico, radio observation, radio wavelength, research, space telescope, star, star cluster, state university, thomas maccarone, university, utah, very large, xray

EAST LANSING, Mich. — Research by Michigan State University astronomers has scientists re-thinking the fates of black holes, particularly in groups of stars known as globular clusters.

The research of Jay Strader, MSU assistant professor of physics and astronomy, and colleagues focused on a cluster called Messier 22, or M22, a collection of hundreds of thousands of stars located about 10,000 light years from Earth. Using images of unprecedented depth observed at radio wavelengths, Strader and his team were surprised to find not one but two black holes in the cluster. (more…)

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VLTI spürt exozodiakales Licht auf

MSU Research Sheds New Light on Star Clusters, Black Holes