If you want to see what the museum and the planetarium are like, you'll have to go there yourself :) Here are just some pictures of the park.
First, the 'allee de l'infini', the infinity path. The first panel represents
a square meter in the park. The next one looks at it from 10 meters up,
and that goes on, multiplying the distance by 10 every time. On the ninth
panel, the earth is just a small circle, and at the end, our galaxy is
just a small dot...
Parts of an Ariane 4 rocket are displayed, some reservoirs and 'jupes',
parts of the fuselage between the stages of the rocket. An Ariane rocket
transports two satellites at once, thereby reducing the launch cost of
a satellite. Some parts have been built by the Dutch company "Fokker".
Also on display is a copy of the MIR space station, which has been
used by the Russians for training purposes.
And lastly, the Ariane 5. Increased pay-load compared to Ariane 4,
and with boosters using solid fuel.
Check out http://www.cite-espace.com for more information.