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How many exoplanets in our Galaxy?

In Cassan et al. 2012 (Nature, 481, 167), “One or more bound planets per Milky Way star from microlensing observations“) we read the following very interesting statement: Here we report a statistical analysis of microlensing data (gathered in 2002–07) that reveals the fraction of bound planets 0.5–10 AU (Sun–Earth distance) from their stars. We find […]

New Paper on exoplanets – the SEAWOLF project

Trawling for transits in a sea of noise: A Search for Exoplanets by Analysis of WASP Optical Lightcurves and Follow-up (SEAWOLF) E. Gaidos, D. R. Anderson, S. Lepine, K. D. Colon, G. Maravelias, N. Narita, E. Chang, J. Beyer, A. Fukui, J. D. Armstrong, A. Zezas, B. J. Fulton, A. W. Mann, R. G. West, […]

New planet around a binary system

It is always fascinating when science fiction becomes reality. This is the case with the Kepler-16b, a binary system that proved to host a cold giant planet (like Saturn), which compiles from gas and rocks. This opens a wide new category of planetary systems since most of the stars belong to a binary system. For […]

Amazing image of Kepler’s candidate transiting planets

An amazing picture was published at the APOD today ! It shows all 1235 candidate planets discovered by Kepler in the same relative scale along with the Sun (top right … the lonely star) with the silhouettes of Earth and Jupiter. Somebody has to search deep in the high resolution image to spot the planets […]

Kepler’s first results

Kepler is a space based telescope to study a small area between Cygnus and Lyra for exoplanet transits of all possible targets but mainly to find Earth sized candidates in the habitable zone. A fist publication reveals these numbers: “On 1 February 2011 the Kepler Mission released data for 156,453 stars observed from the beginning […]