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How Binary Stars May FormPasadena CA (JPL) May 24, 2010 Our sun may be an only child, but most of the stars in the galaxy are actually twins. The sibling stars circle around each other at varying distances, bound by the hands of gravity. How twin stars form is an ongoing question in astronomy. Do they start out like fraternal twins developing from two separate clouds, or "eggs"? Or do they begin life in one cloud that splits into two, like identical twins born from one egg? Astronomers generally believe that widely spaced twin, or binary, stars grow fr ... read more |
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Paris (AFP) May 19, 2010Astronomers have discovered a new type of exploding star that spews huge quantities of calcium and defies the two known categories of supernovae, according to a pair of studies released Wednesday. Only a handful of these novel star bursts have been spotted over the last few years, but they could explain the abundance of calcium observed in galaxies like our own Milky Way, the researchers sai ... more 
by Staff WritersSanta Barbara CA (SPX) May 19, 2010 Astrophysicists at UC Santa Barbara are the first scientists to identify two white dwarf stars in an eclipsing binary system, allowing for the first direct radius measurement of a rare white dwarf composed of pure helium. The results will be published in the Astrophysical Journal Letters. These observations are the first to confirm a theory about a cert ... more  
Paris, France (ESA) May 19, 2010A new section in the ESA web site highlights the Agency's growing activity related to the Space Situational Awareness programme. The full SSA system will protect Europe's citizens and satellite-based services by detecting space hazards. The Space Situational Awareness Preparatory Programme was authorised at the November 2008 ESA Ministerial Council and formally launched in 2009. More ... more |
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Einstein And Einstein A: A Study In Crater MorphologyGreenbelt MD (SPX) May 17, 2010 Located on the western limb of the Moon, Einstein and Einstein A craters (16.3oN, 271.3oE ) are only visible to Earth-based observers during certain lunar lighting and orientation conditions. Einstein A is younger than Einstein, as indicated by the fact that it lies squarely in the middle of the floor of Einstein. When viewed in topographic data, these two craters reveal much about the relative age and shape of an impact crater. To understand further, let's first take a look at Einstein. Ein ... read more |
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