Share news, stories, or discussions about government and private spaceflight programs; including ESA, ISS, NASA, Russian Space Program, Virgin Galactic, & more!

Mathematical and physical problems of space flight and astronomy.

Astronomy news & discussions, Astrophotography, Telescopes, Star Charts, & more. Galaxies, Stars, Planets & Moons, discuss it all here!

Model, Amatuer, Experimental, and High Power Rocketry. Vehicle and Motor/Engine Design, Physics and Math, Fabrication, Flights, Testing and Evaluation. Share your rocket projects here!

General off-topic discussions. Political or religious topics may only be posted in The Basement forum.

ALL threads posted in a language other than English should be posted here, from Orbiter threads to off-topic threads. Make sure you use a prefix for all new threads with an abbreviation of the language posted! See International Forum Rules inside.