Brown dwarf,illustration

Bildnummer 11696257
Brown dwarf,illustration
Brown dwarf. Computer illustration showing the disc of gas and cosmic dust around a brown dwarf. 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 Millimetre/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. This surprising finding challenges theories of how rocky,Earth-scale planets
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / M. Kornmesser (ESO) / NRAO) / NAOJ / ALMA (ESO
Bildgröße: 3810 px × 2357 px
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