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Past internal seminars

Resonances and chaos in the dynamics of trans-Neptunian objects

November 8, 2019
From 10:30 until 12:00

Melaine Saillenfest IMCCE   Trans-Neptunian objects have complex orbital dynamics involving mechanisms as diverse as close encounters with Neptune, chaotic scattering driven by resonance overlap,...[more]

Magnetic fields in nearby galaxies: A new low-frequency radio continuum perspective

October 25, 2019
From 10:30 until 12:00

Sarrvesh Sridhar Astron   Non-thermal radio continuum emission is an excellent tracer of magnetic fields in galaxies. Historically, observations of galaxies at low radio frequencies (below 1 GHz)...[more]

Why Modify Gravity?

October 18, 2019
From 10:30 until 12:00

Jackson Said University of Malta   The standard model of cosmology has shown remarkable success in explaining cosmological observations in recent decades. This model consists of Einstein's theory...[more]

Galaxy evolution: a gas perspective

October 11, 2019
From 10:30 until 12:00

Jonathan Freundlich Hebrew University   Galaxy history is marked by a peak of star formation ten billion years ago and a subsequent drop of the star formation rate (SFR) by an order of magnitude....[more]

Unveiling the Milky Way stellar halo distribution with multi-wavelength photometry

October 4, 2019
From 10:30 until 12:00

Guillaume Thomas NRC Herzberg Victoria   The stellar halo of our Galaxy is mostly formed by stars that were initially lying in dwarf galaxies and globular clusters, which have been disrupted by...[more]

Gravitational probes of dark matter

September 27, 2019
From 10:30 until 12:00

Justin Read University of Surrey   Dark matter makes up most of the mass of the Universe but remains mysterious. I discuss recent progress in constraining its properties by measuring its...[more]

Assembling the Milky Way

September 20, 2019
From 10:30 until 12:00

Florent Renaud Lund   In the Gaia era, and with more and more complete surveys, the assembly of the Milky Way is being scrutinized with an always increasing accuracy. The kinematic and chemical...[more]

La mission Planck et le modèle cosmologique

September 13, 2019
From 10:30 until 12:00

Jean-Loup Puget IAS/ENS   Les données de la mission Planck ont vérifié plusieurs prédictions génériques du paradigme d'inflation qui donne une base physique aux conditions initiales du modèle...[more]

Search & Find
Dec 3 2020

Gaia is an ambitious ESA mission to chart a three-dimensional map of our Galaxy with unprecedented...

May 13 2020

The ObAS seminars have moved online, every Friday morning at 10:30 here The program of the coming...

Feb 25 2021

Un poste de maître de conférences est ouvert au concours à l’Observatoire astronomique de...

Dec 15 2020

Comme la plupart des galaxies spirales, la Voie lactée a en son centre une condensation d'étoiles à...

Oct 9 2020

Le Globe de Coronelli de Strasbourg restauré sera inauguré officiellement (sur invitation) ce...

Sep 19 2020

En raison de la situation sanitaire, il n'y aura pas de visites de la Grande Coupole de...