Des mondes similaires au nôtre cachés dans des centaines d’exoplanètes ? SETI PR en Francais
Published 6/9/2014 in Franck Marchis Blog Author Franck Marchis
Communiqué de presse de l'Institut SETI et de CASCA Monday, June 09 2014 - 12:15pm, PDT Mountain View, CA - Cette année a été intense pour les chasseurs d’exoplanètes, ces planètes autour d’autres étoiles. Une équipe d'astronomes de l’Institut SETI et du centre de recherche de la NASA Ames a découvert 715 nouvelles exoplanètes enfouies dans les données du télescope spatial Kepler. Ces nouveaux mondes qui tournent autour de 305 étoiles différentes, constituent des systèmes planétaires multiples, similaires a notre système solaire, lui-même constitué de huit planètes. L’annonce de cette découverte a été suivie par une nouvelle encore plus importante dans le monde... read more ❯

Kepler is Sick and Resting: "Mountain View, we have a problem"
Published 1/17/2013 in Franck Marchis Blog Author Franck Marchis
"Mountain View, we have a problem..." NASA Kepler Manager at NASA Ames, Mountain View announced today that they interrupted the science operation of the spacecraft, due an issue with one of the reaction wheels.  Kepler is equipped with four reaction wheels which are used to accurately point the telescope. One failed in July 2012 and today the team announced that they detected issues with a second one. Kepler needs three reaction wheels to be used properly, if this one fails the mission is most likely over. That's not good news. The team detected an increase of friction on reaction wheel #4 on January... read more ❯

Kepler-16: Exoplanets around binary star systems DO exist
Published 9/15/2011 in Franck Marchis Blog Author Franck Marchis
Kepler-16 is another great discovery coming from the Kepler telescope, the 10th NASA Discovery mission which is devoted to finding Earth-size exoplanets by monitoring variations of brightness due to transit. Today the Kepler team found a circumbinary exoplanet, an exoplanet orbiting a binary star system. Did they find Tatooine? In the large 105 deg2 field of view of the Kepler spacecraft, ~156,000 stars are being almost continuously observed by the 0.95m telescope. In 2010, the star number KIC... read more ❯

A landslide of Kepler Exoplanet Candidates
Published 2/2/2011 in Franck Marchis Blog Author Franck Marchis
There will be a before and after Kepler Era in astronomy. Today, with the release of 1,202 exoplanet candidates from data collected with the Kepler spacecraft over 140 days of observation, we have just entered in a new age of astronomy. The Kepler spacecraft is the 10th NASA Discovery mission launched in March 2009 which was designed to search for exoplanets by measuring almost continuously the brightness of 156,453 stars in a small 12 degree diameter patch of the sky. The 0.95m-telescope is able to detect attenuation of the host star located in the Cygnus, Lyra, Draco constellations which could be... read more ❯

Kepler-10b – The first unambiguous rocky exoplanet
Published 1/10/2011 in Franck Marchis Blog Author Franck Marchis
It is done. The Kepler team finally announced the discovery of its first terrestrial exoplanet. A referred journal, accepted in the Astrophysical journal (here) by Natalie Batalha and a large number of colleagues, describes this new member of the exoplanet family. This is the 519th known exoplanet based on the Extra-solar Planets Catalog, but definitely a special one. This... read more ❯