2005
Page 1 - results 1 to 10
The stellar occultation by Charon of 11 july 2005
A very rare phenomenon allowed astronomers to derive an accurate value for Charon’s size: on 11 July 2005, Pluto’s satellite occulted the 15th magnitude...
An extra second in 2005
January 1, 2006, at 1 hour in the morning, it will be necessary to delay watches by just a second. Very exceptionally, the minute between midnight 59...
Titan, ten months after the successful landing of the Huygens probe
On 30 November 2005, the journal Nature publishes on line articles presenting the first scientific results from the European Huygens probe, which landed on...
The largest matter concentration on large scale of the local Universe
Since the years 80’s, we know that our Galaxy, the Milky Way, and about thirty nearby galaxies which form the "Local Group" of galaxies, move at high speed...
Venus Express launched successfully on 9 November 2005
On 9 November, the Venus Express probe was launched by a Soyouz rocket from Baïkonour in Kazakhstan. This mission of the European Space Agency (ESA) has...
A numerical method "multi-zoom" to study galaxy formation
When it grows, a galaxy accretes the matter which surrounds it by gravitational attraction. This process can occur during discrete events: merger with a...
The moonlets of asteroid 87 Sylvia: Remus and Romulus
The observations of the moonlets’ orbits allow the astronomers to precisely calculate the mass and density of Sylvia. With a density only 20% higher than the...
A dual emission mechanism at the Galactic Centre?
Thanks to recent Galactic Centre observations performed in the thermal infrared with NACO at VLT, astronomers working at LESIA (Observatoire de Paris) and at...
First observation of a meteor in the Martian atmosphere
In passing close to the Sun, comets lose a large number of small particules, which spread out, but continue to travel along the orbit of the comet. When a...
Explaining the acceleration of the fast solar wind
It has been more than four decades since the existence of the solar wind has been confirmed by the measurements of the Mariner 2 spacecraft. However, the...