An incredible travel through space and time between the walls of the Paris Observatory, which is celebrating its 350th birthday. Place of discoveries such as speed of light or Neptune’s existence, it is still today one of the oldest operating observatories and the greatest hub in the world for astronomy and astrophysics researches, second only to Harvard.
| Actor | Role |
|---|---|
 Jérémie VaubaillonSelf | Self |
| PPierre DrossartSelf | Self |
 Étienne PariatSelf | Self |
| IIsabelle BualéSelf | Self |
| CClaude CatalaSelf | Self |
| AArnaud LandraginSelf | Self |
 Pascal DescampsSelf | Self |
| VVincent Coudé du ForestoSelf | Self |
| TTheo ten BrummelaarSelf | Self |
| SStephen T. RidgwaySelf | Self |
| NNorm VargasSelf | Self |
| TThierry FouchetSelf | Self |
| SStéphane CorbelSelf | Self |
| HHélène SolSelf | Self |
| FFrançois HammerSelf | Self |
| MMyriam RodriguesSelf | Self |
 Raphaël MathonNarrator (voice) | Narrator (voice) |