Space sailing technology, trajectories, and general information on solar sailing ships.

Khagol Mandal, The largest Amateur Astronomers Association in Mumbai

Astromomy resources for amateur astronomers and astronomy. The Astronomy Search Tool with over half-a-million messages.

navigate the night sky, identifying Planets, detailed Lunar features, Galaxies, Nebulas and stunning Star Clusters

Astronomy in Mt. Washington Valley is a resource center for the many amateur astronomers and astro-photographers in our area.

meteorites bought and sold by bolidechaser, quality meteorites for collectors, investors, astronomers, educators, natural history scientists, and the general ...

The Center for Science Education at UC Berkeley Space Sciences Laboratory is dedicated to making space science information accessible to educators and public.

Providing a public forum for scientific research, informational exchange, and social interaction for individuals interested in the science and hobby of ...

Cape Instruments, manufacturers and suppliers of telescopes - catadioptrics, reflectors, refractors and accessories.

British Astronomical Association - Amateur Astronomy in the UK