ROSETTA FOUND WATER ICE ON THE SURFACE OF A COMET

Jul

1

2015

Rosetta, located in orbit around comet 67 p/Churyumov-Gerasimenko, discovered on its surface 120 bright spots of a width not less than a few meters. Their composition is not yet determined, but scientists pay attention that most of the time are in the shade. In addition, for the month of observations in them there had been no change.

“The most plausible version that patches are composed of water ice,” said Antoine Pommerol′, a researcher from the University of Berne. -During our observations of the Comet was far enough from the Sun because water ice could not quickly sublimate even under direct sunlight. At the same time, if the spots were zamërzšim carbon dioxide or carbon monoxide poisoning, the same amount of sunlight would cause their sublimation. ”

Discovered spots in 10 times brighter than the surface of the comet. They are often located in groups, especially at the foot of the cliffs. Researchers attribute this erosion, resulting in a section of rock break away and expose the inner material of the comet.

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