European Astrónonomos today announced the discovery of a planetary system with three super-Earths orbiting a bright dwarf star, one of which appears to be a planet of molten volcanic rocks.
The system with four planets is in the northern hemisphere constellation of Cassiopeia, having the shape of an M and being 21 light years from Earth, researchers adiantaram the European journal Astronomy & amp; Astrophysics.
This system seems to consist of a giant planet and three super-Earths that are orbiting around a dwarf star, nicknamed HD219134. The super-Earths have been so designated because they have a greater mass than the Earth, but still be lighter than the gaseous planets Neptune, Saturn or Jupiter.
The planet to orbit shorter, HD219134b, is around every three days, having already been observed, the Earth’s point of view, in transit around the sides of your star.
Measurements from the ground, made with the Spitzer Space Telescope NASA showed that its mass is 4.5 times higher and wider than 1.6 the height and width of the Earth’s mass.
“Its mean density is near the Earth’s density, suggesting a similar composition. It is very close to the star. The temperature is about 700 degrees Kelvin. ” (About 427 Celsius), according to the account of a press release from the University of Geneva, where he works the team of astronomers responsible for the research.
So it’s not a habitable zone and would not have water needed for human life.
However, HD219134b is exciting for researchers in the area for being the planet closest to Earth transit, thus providing a rare opportunity to study further their composition and atmosphere against the cloth . bottom of your star
“These systems are especially interesting in that it allows – through the study – to characterize the planet’s atmosphere, the starlight that passes through the atmosphere,” Udry said co-author report from the University of Geneva
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