2009
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A new window for the observation of dust growth in molecular clouds
For a long time researchers have assumed that the dust particles grow in molecular clouds and form a seed population for the formation of planets in later...
A multifaceted astronomical dictionary
On the occasion of the International Year of Astronomy (IYA2009), a Paris Observatory astronomer has created an interactive dictionary of astronomical...
The Andromeda galaxy seen as never, at the 21-cm wavelength
One of the deepest survey of the Andromeda galaxy (M 31) has just been completed by L. Chemin (Observatoire de Paris) and his collaborators in the 21-cm...
A population of compact elliptical galaxies detected with the Virtual Observatory
Compact elliptical galaxies (cE) are rare objects, which are usually observed as neighbours of massive galaxies, such as Messier 32 around Andromeda. Since...
First light for Planck
The Planck satellite is in good shape. The First Light Survey, performed to demonstrate the stability of the instruments and the ability to calibrate them...
First Solid Evidence for a Rocky Exoplanet
An international team (A) of astronomers, among which astronomers from Paris Observatory, have measured the mass and density of the smallest exoplanet. The...
Andromeda, the cannibal
An international team of researchers, with one from Paris Observatory, has just observed the Andromeda galaxy (M31) and her partner, the Triangulum galaxy...
Fermi reveals various populations of gamma-ray pulsars
It was not sure at all, when the Fermi satellite was launched, that it could detect any of the millisecond pulsars (MSP) through their gamma-ray emission....
Solar-like oscillations have been discovered in a massive star by CoRoT
Oscillations of the same nature as those seen in the Sun have been discovered - thanks to CoRoT(*) - in a massive star, V1449 Aql (HD180642), which is a...
Io close to thermal equilibrium
Is Io in thermal equilibrium? Using a set of astrometric observations of the four Galilean moons (Io, Europa, Ganymede and Callisto) covering the years...