The lab regularly hosts colloquia and workshops that focus on particular subjects
which are chosen amongst the different fields and projects of the lab.
These meetings last several days and are intended for professionals only.
Quasars and AGN’s (~500 000) are with stars (~1 billion), the most fascinating targets up to
be collected by the Gaia satellite which constitutes a fully funded ESA 'Cornerstone' mission.
The Gaia mission, typically built for quasi-punctual sources, will detect over the whole sky
and with an exceptional accuracy quasars as well as bright and compact AGNs on the deepest z-coverage.
The science with quasars brings fundamental bases to build reference systems as well as to link
supermassive black holes and star formation histories at the earliest epochs. The GAGNES meeting concerns a large
community of scientific researchers and engineers involved and/or interested by Gaia data (analysis, mining, physics).
On the other hand, the GAGNES meeting will gather the widest community on various topics for the science exploitation and complementary programs.
Einstein's theory of relativity has been successful in explaining and predicting many gravitational phenomena.
Experimentally, however, we do not know how gravity behaves at distances shorter than about 0.01 mm.
For example there may be hidden dimensions at short distances. In fact, many theories, including superstring theories
and M-theory, require the existence of such extra dimensions. Gravity at very long distances, e.g. billions of light-years,
may also be as weird as at short distances. Precision observational data revealed that the expansion of our universe
is accelerating. If Einstein's theory is correct, this requires that more than 70 percent of our universe is filled
with invisible, negative pressure, energy. This energy is named dark energy, but we do not know what it really is.
We thus wonder if we can change Einstein's theory at long distances to address the mystery of dark energy.
These considerations let us believe that gravity is the key to tackle the mysteries in modern cosmology such as
dark energy, dark matter, inflation and big-bang singularity. Toward this ambitious goal, in this mini-workshop we get
together and explore various aspects of gravity and cosmology.
The goal of this conference is to bring together theorists, observers, and simulators to discuss the latest
developments in cosmology. We expect some emphasis on topics related to "first light" (such as 21-cm cosmology, high redshift
galaxies, the first stars, and cosmic reionization), along with a broad variety of other hot topics in cosmology.