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Feb 22

Found 'water planet', a new class of worlds

The exoplanet orbits its dim water, a dwarf-red 300 times fainter than the Sun, every 38 hours, at a distance of 2 million kilometers star, which allows to calculate its ambient temperature at something close to 230 ° C - Credit : Nature / Charbonneau at al (2009).

Hubble Space Telescope discovered extrasolar orb of different type.

Smaller than Uranus and larger than Earth, the exoplanet is a world not only covered, but mostly water, surrounded by a thick gaseous atmosphere. "What GJ 1214b is unlike any other planet we know. A huge fraction of its mass consists entirely of water, "said Zachory Berta, the Harvard-Smithsonian Center for Astrophysics.

The exoplanet GJ 1214b, considered a super-Earth, was discovered in 2009 In 2010, studies indicated that its atmosphere was composed mostly of water vapor. Now, more detailed studies , including a new observation with the Hubble telescope, helped to rule out other possibilities, like a haze.

Droughts mists are more transparent to infrared light than visible light. The Hubble observations helped establish the atmosphere of the exoplanet is consistent with water vapor.

Alien materials

But then came the news: the planet seems to be almost an exoplanet water. As the mass and size of the orb were determined quite accurately, astronomers were able to calculate its density - only two grams per cubic centimeter. Water has a density of one gram per cubic centimeter, while the mean density of the earth is 5.5 grams per cubic centimeter. This suggests that GJ 1214b has much more water than Earth, much less rocks.

By consequence, the internal structure of exoplanet water should be extraordinarily different from Earth. "High temperatures and high pressures [inside the planet] should form exotic materials like 'hot ice' and 'superfluid water', substances that are completely alien to everyday experience, "Berta said.

The exoplanet water is located 40 light-years away from Earth in the constellation of Ophiuchus (or Serpent). It has 2.7 times Earth's diameter and weighs almost seven times more. GJ 1214b orbits its dim star, a dwarf-red 300 times fainter than the Sun, every 38 hours, at a distance of two million kilometers, which allows to calculate its ambient temperature at something close to 230 ° C.

CREDIT: NATURE

Artistic held in 2009

Artistic held in 2009

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Credit: UFO Magazine

Link: http://www.ufo.com.br/noticias/encontrado-earth-water-a-new-class-of-worlds

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