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Although astronomers believe that dark matter accounts for 25% of the total mass of the Universe, if one asks them how it looks like, he/she will only get a straight face. So far, it does not emit or reflect enough electromagnetic radiation to be observed directly, so its presence can only be inferred from gravitat... |
10 May 2007
03:34 GMT |
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Globular clusters (globulus is Latin for small sphere)have been considered fully explained until recently, when new observations by NASA's Hubble Space Telescope showed intriguing images that changed the classical perception of this massive star agglomerates.Astronomers have assumed that globular star cluster h... |
2 May 2007
11:02 GMT |
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Galaxies and their origin and evolution are a major interest area for astronomers, and in particular of our host galaxy, the Milky Way.Since a detailed physical scenario of its birth and growth is still missing, its understanding requires the joint effort of observations, theories and complex numerical simulations.E... |
27 March 2007
02:58 GMT |
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German astronomers have discovered a rich globular cluster of about 100,000 stars in the center of our Galaxy, placed 30,000 light-years away from the solar system and 10,000 light-years away from the Galactic Centre. Globular star clusters are groups of stars with similar ages, composition and distances representing... |
19 March 2007
04:08 GMT |
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