2007
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Be stars and binaries of the Small Magellanic Cloud
Among hot stars, certain B stars are known as fast rotators and for their specific characteristic of being surrounded by an anisotropic gaseous...
The chemical diversity of comets dates back to their origin
A well-studied comet appears to be uniform in chemical composition. Scientists from Johns Hopkins University and LESIA of Paris Observatory studied two...
Detection of interstellar propylene in the dark cloud TMC-1
The propylene molecule has been detected in the dark interstellar cloud TMC-1 by a team composed of Spanish, German and French astronomers. Several...
The Milky Way: an unusual galaxy and an exceptionnally calm formation
Astrophysicists generally consider our Galaxy as an ordinary spiral galaxy, and even use its properties to characterize models of numerical simulation to...
COROT: discovery of an exoplanet and first stellar oscillations
Corot discovers its first exoplanet called Corot-Exo-1b. Its diameter is between 200 and 250 000 km, and it orbits around its star in 1.5 days only. Corot...
First detection of molecular oxygen in the interstellar medium
Molecular oxygen has long been considered as an abundant and potentially important component of molecular clouds. However, its search has remained...
Toward a Unified Description of Dark Energy and Dark Matter
From various independent observations, cosmologists have established that ordinary matter, made of protons and neutrons, accounts for only 4% of the total...
The PLANCK satellite
The Planck satellite, built to map the anisotropies of the cosmic background micro-wave radiation of the Universe with unprecedented accuracy (it will be 30...
Cold gas and molecular depletion in pre-stellar cores
The physical conditions in interstellar clouds which give birth to stars are still not well-known. In particular, in their dense cores, cradles of the stars...
The lakes on Titan
The instrument Radar of Cassini, in orbit around Saturn, regularly observes the surface of Titan with a resolution better than the kilometer. Thanks to the...