Observing

Announcing Sky Almanac v3

Now you have no excuse for missing the International Space Station, planetary conjunctions and more! ... Read More...

Tune-up your eyes for optimal nighttime viewing!

If you wear glasses for distant viewing, are they optimised for nighttime use? ... Read More...

Interactive 'scope calculator

Take the guesswork out of telescope math with this handy utility... Read More...

What's the smallest reflecting telescope you'd use?

If you think a Newtonian under 10cm (4-inch) aperture is too small to be useful, consider this... Read More...