Title : Is this the best candidate yet for a second Earth? Astronomers find rocky planet which could have liquid water - and even life
link : Is this the best candidate yet for a second Earth? Astronomers find rocky planet which could have liquid water - and even life
Is this the best candidate yet for a second Earth? Astronomers find rocky planet which could have liquid water - and even life
* planet orbits the star 22 light years from Earth* The orbits the sun in just the right distance for liquid water
* rocky planet like Earth
* 'Best new candidate to support liquid water - perhaps life, "says study leader
* Find the common type of around stars: hinted that there could be billions of worlds '' like Earth in our galaxy
astronomers have discovered a planet that is one of the best candidates for life that has been found by telescopes on Earth. the planet is rocky, like ours, and orbits its sun in the "habitable zone" where temperatures are right for liquid water to exist on the planet's surface.
the surface temperature could be close to the Earth.
"This planet is the new best candidate to support liquid water and, perhaps, life as we know it," he said study leader Guillem Anglada-Escudé.
the planet was detected using data from telescopes at the European Southern Observatory, which was analyzed for '' wobbles in the motion of a star caused the gravitational 'tug' of planets orbiting around it.
the new planet has a mass about 4.5 times that of Earth and orbits a star called GJ 667C, 22 light years from Earth. - right next door, in galactic terms
the new planet absorbs about the same amount of light that our planet.
"This is expected to be a rather unlikely star to host planets. However, are there around a very close example, metal-poor the most common type of star in our galaxy, "said Steven Vogt, professor of astronomy and astrophysics at UCSC.
'Planet it is around a star in a triple star system. the other stars are pretty far, but it would look quite nice in heaven. "
" detecting this planet, this nearby and this soon, implies that our galaxy must be filled with billions of rocky planets potentially habitable.
"with the arrival of a new generation of instruments, researchers will be able to study many M dwarf stars similar planets and eventually look for signs of life in one of these worlds, "Anglada-Escudé said.
the host star is a member of a system three stars - the other two are orange dwarf planets
the star has a different chemical composition to our sun, with a lower abundance of elements heavier than helium, such as iron, carbon elements. silicon. This discovery indicates that potentially habitable planets can occur in a greater variety of environments than previously thought.
GJ 667C had previously been observed to have a large planet orbiting close to its star, although this finding was not published.
This planet orbits so close to the star that it would be too hot for liquid water. The new study was initiated with the aim of obtaining the orbital parameters of this super-Earth.
But in addition to this first candidate, the research team found that a clear signal of the new planet (GJ 667Cc.
the team found that the system might also contain a gas giant planet and a super-Earth additional
However, more observations to confirm these two possibilities are needed
Source:.. MailOnline
"Is this the best candidate yet for a second Earth? Astronomers find rocky planet which could have liquid water - and even life", article source: riseearth.com
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