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best conditions for exterristrisches life: the first time, astronomers have found evidence for a water-rich stony asteroids or minor planets outside our own solar system
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astronomers have deeply on large amounts of water found in the remains of a boulder in the All Notes -., and thus the existence of habitable planets outside our solar system
Thus, two “key ingredients” for habitable celestial bodies were first detected outside our solar system together – namely water and rocky surfaces
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The debris of the small celestial body orbiting a star that is from Earth some 150 light-years, as the discoverer to Jay Farihi of the University of Cambridge in the U.S. journal ” Science “report.
“Our results show that definitely the potential for habitable planets in this Exoplanetensystem exists” Farihi said in an announcement of his university. Notes on life, researchers have not discovered.
regard to water so far only gas planets
signs of water outside our solar system had previously been found only in the atmospheres of planets, but not in rocky celestial bodies. The now examined dust and debris parts of the former so-called minor planets orbiting a white dwarf star, a dying sun of high density.
Astronomers had taken the “Hubble” space telescope some 150 light years distant star called GD 61 targeted. He was once a little larger than our Sun, but has already reached the end of his life and has shrunk to a so-called white dwarf star.
The immense gravity of the white dwarf has destroyed an asteroid or minor planet, the researchers report. The debris fall gradually to the star and there are detectable. In the atmosphere of the white dwarf, the astronomers while unexpectedly came across a lot of oxygen.
“This excess oxygen can be carried by either carbon or water,” said co-author Boris Gänsicke of the University of Warwick (UK). “And in the Star there is virtually no carbon – which shows that there must have been considerable amounts of water.”
water fraction of the celestial body is 26 percent
The observed fragments are probably from a small planet who had at least 90 kilometers in diameter, but probably much more, as the researchers have calculated. From the comparison with the incidence of proven rock ingredients such as magnesium, silicon and calcium, they determined the water content of the destroyed celestial body to 26 percent. For comparison, the Earth is only about 0.02 percent of water
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“The discovery of water in a large asteroid means that the building blocks of habitable planets in the DG-61 system existed and may still exist,” said Farihi. “And probably even with a significant number of similar parent stars.”
The view of the researchers on the white dwarf orbiting debris and it could therefore also be a glimpse into our own future. Even our sun will end in a very distant future as a white dwarf.
If in six billion years, an alien astronomer discover rock material at our sun burned, he could come to the same conclusion as now, astronomers when looking at GD 61 – namely that once terrestrial planets orbiting our sun.
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