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Posts Tagged ‘HARPS’

Three Planets In Habitable Zone Of Nearby Star

June 26, 2013 1 comment

Artist's impression of the Gliese 667C system. Image Credit: ESO/M. Kornmesser

Artist’s impression of the Gliese 667C system. Image Credit: ESO/M. Kornmesser

A team of astronomers has combined new observations of Gliese 667C with existing data from HARPS at ESO’s 3.6-metre telescope in Chile, to reveal a system with at least six planets. A record-breaking three of these planets are super-Earths lying in the zone around the star where liquid water could exist, making them possible candidates for the presence of life. This is the first system found with a fully packed habitable zone.

Gliese 667C is a very well-studied star. Just over one third of the mass of the Sun, it is part of a triple star system known as Gliese 667 (also referred to as GJ 667), 22 light-years away in the constellation of Scorpius (The Scorpion). This is quite close to us — within the Sun’s neighbourhood — and much closer than the star systems investigated using telescopes such as the planet-hunting Kepler space telescope.

These planets orbit the third fainter star of a triple star system. Viewed from one of these newly found planets the two other suns would look like a pair of very bright stars visible in the daytime and at night they would provide as much illumination as the full Moon. The new planets completely fill up the habitable zone of Gliese 667C, as there are no more stable orbits in which a planet could exist at the right distance to it.

Full Story: http://www.eso.org/public/news/eso1328/
Also: https://carnegiescience.edu/news/one_star_three_habitable_planets
Also: http://www.washington.edu/news/2013/06/25/astronomers-find-three-super-earths-in-nearby-stars-habitable-zone/
Also:http://keckobservatory.org/news/scientists_discover_system_with_three_planets_in_habitable_zone

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50 New Exoplanets Discovered, Including 16 New Super-Earths

September 13, 2011 Leave a comment

Credit: ESO/M. Kornmesser

Credit: ESO/M. Kornmesser

Astronomers using ESO’s world-leading exoplanet hunter HARPS have today announced a rich haul of more than 50 new exoplanets, including 16 super-Earths, one of which orbits at the edge of the habitable zone of its star. By studying the properties of all the HARPS planets found so far, the team has found that about 40% of stars similar to the Sun have at least one planet lighter than Saturn.

The HARPS spectrograph on the 3.6-metre telescope at ESO’s La Silla Observatory in Chile is the world’s most successful planet finder [1]. The HARPS team, led by Michel Mayor (University of Geneva, Switzerland), today announced the discovery of more than 50 new exoplanets orbiting nearby stars, including sixteen super-Earths [2]. This is the largest number of such planets ever announced at one time[3]. The new findings are being presented at a conference on Extreme Solar Systems where 350 exoplanet experts are meeting in Wyoming, USA.

Full Story: http://www.eso.org/public/news/eso1134/