This is my main website for astronomy education and discovery. Developed over 20 years ago and updated ever since, it contains my complete collection of published popular essays on topics from cosmology and black holes, to space travel and weird things in nature.
Space Math @ NASA – Math problems galore!
Space Weather – All about nasty solar storms
The Mystery of Gravity – All things gravitational
Weird Things in the Attic – Ghost lights etc, etc.