File:Artist’s impression of the disc of dust and gas around a brown dwarf.jpg
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editDescriptionArtist’s impression of the disc of dust and gas around a brown dwarf.jpg |
English: Rocky planets are thought to form through the random collision and sticking together of what are initially microscopic particles in the disc of material around a star. These tiny grains, known as cosmic dust, are similar to very fine soot or sand. Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have for the first time found that the outer region of a dusty disc encircling a brown dwarf — a star-like object, but one too small to shine brightly like a star — also contains millimetre-sized solid grains like those found in denser discs around newborn stars. The surprising finding challenges theories of how rocky, Earth-scale planets form, and suggests that rocky planets may be even more common in the Universe than expected. |
Date | |
Source | http://www.eso.org/public/images/eso1248a/ |
Author | ALMA (ESO/NAOJ/NRAO)/M. Kornmesser (ESO) |
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current | 11:36, 30 November 2012 | 4,000 × 2,475 (1.85 MB) | Stas1995 (talk | contribs) | ||
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Credit/Provider | ALMA (ESO/NAOJ/NRAO)/M. Kornmesser (ESO) |
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Source | European Southern Observatory |
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Date and time of data generation | 12:00, 30 November 2012 |
Keywords | ISO-Oph 102 |
Contact information |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |