An opened window on the universe.

Heavens-Above (in english)

This web site is a gate on huge data base that list a major part of artificials satellites turning around our Earth. It's a real great job specialy when you're looking for Iridium Flares. This site provide also many informations about constellations, planets and so on.

Bureau des longitudes. (in english) (in french)

The B.D.L. was founded in 1795. The main purposes was to solve astronomical problems related to the determination of the longitude at sea, strategic at this time.