ESO, European Organisation for Astronomical Research in the Southern Hemisphere
Astronomy.com is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes, comets,...
Website dedicated to amateur astronomy and visual observing. Features sketches, printable star atlases, DSO observing guide, how-to articles and other resources
Find astronomy targets and generate object lists for your observing and astrophotography sessions.
STO covers Space from Earth to the Edge of the Universe