2012
Page 1 - results 1 to 10
The red giant cores contract and spin down
Usually, investigating directly the core of the stars is not possible. Usually, when a body contracts, its rotation speeds up. With red giants, things are...
Photochemistry on Venus: a very fast evolution
A team of astronomers of the Paris Observatory has just highlighted a very rapid variation of the sulphur dioxide (SO2) on the surface of Venus). Mapping of...
Streams in the Milky Way halo : the case of Palomar 5
An international team of astronomers, including two scientists from GEPI, has studied the formation and characteristics of the tidal tails surrounding the...
Largest ever Cherenkov telescope sees first light
On 26 July 2012, the H.E.S.S-II telescope started operation in Namibia. Dedicated to observing the most violent and extreme phenomena of the Universe in...
AstroConcepts: A Browser Embedded Astrophysical Dictionary
A novel semantic tool created at Paris Observatory provides definitions of astronomical concepts present on any Web page. This tool, called AstroConcepst, is...
Colliding galaxy cluster unravelled
LOFAR is a new radio interferometer at very low frequency (wavelength of a few dizains of metres), which is obtaining some of its first images. It has...
The history of galaxies is written in the stars
The oldest galaxies in the Universe are up to three times more massive than was previously thought. They contain more dwarf stars and fewer bright giants...
Systematic variation of the initial mass fonction (IMF) in early-type galaxies
For a better knowledge of the evolution of galaxies, and of the mass locked up into stars, it is essential to evaluate the initial mass function of stars...
Counting down to the Transit of Venus - our nearest exoplanet test-lab
Three months before the last transit of Venus this century, scientists are gathering at the Observatoire de Paris to finalise their observation plans in a...
Be stars have a larger core than predicted
Two continuous observations during 27 and 157 days by the CoRoT CNES space mission have allowed an international team led by an astronomer from the Paris...