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A planet is evaporating in a neighboring galaxy

10.06.2012

Astronomers from the University of Texas at Austin, using the Hobby-Eberle telescope at the McDonald Observatory, have confirmed that a planet the size of Jupiter is literally evaporating in a nearby star system. It is too close to its parent star and therefore slowly "boils away" under the influence of stellar heat. Scientists were able to study the composition of the atmosphere of a distant giant planet and better understand how planets and stars interact in other star systems.

The star HD189733 lies about 63 light-years from Earth in the constellation Vulpecula. In 2010, another team of astronomers studied the star in ultraviolet light with the Hubble Space Telescope and found that it has a planet (HD189733b) that is flinging hydrogen into space.

A new study has shown that this stream of hydrogen is much hotter than previously thought - this allows you to estimate the most powerful outbursts of the star that interact with the atmosphere of HD189733b.

The planet HD189733b is not at all like the Earth - it is a gas giant 20% heavier than Jupiter. At the same time, it is located 10 times closer to its parent star than Mercury is to the Sun.

But while HD189733b is different from Earth and cannot be home to life, studying it will help astronomers understand how interactions between stars and planets could affect potentially habitable worlds. One day, astronomers will be able to use the research techniques used in the study of HD189733b to study potentially habitable Earth-like planets. To date, astronomers have discovered about 700 planets orbiting stars in our galaxy (with thousands of candidate planets and billions potentially existing in the galaxy). The pace of progress in this area is impressive: twenty years ago, people did not know a single exoplanet, and now they can study their atmosphere, although so far it only concerns hot giants close to the stars. But so far, the atmospheres of only a few planets have been studied, and much work remains to be done in this area.

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"In pots with imitation of Martian soil, the researchers planted clover, and some of them added the bacterium Sinorhizobium meliloti. In the company of symbiotic microbes, plants developed better: the root system and shoots increased by 75% compared to samples that grew in soil without bacteria," - the article says.

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