Moonstick Co. - manual visual calculators for astronomy, timekeeping, and computation

Makers of a range of slide rules and related devices, with copious explanation. Neat!

to astronomy maths mechanica slide-rule ... on 29 June 2015

Astrometry.net

Free software that identifies the location of arbitrary photographs of starfields. They're running it automatically against Flickr photos now. This is really very neat -- and there's some Real CS underneath it too.

to astronomy graphics software ... on 07 November 2008

The Astronomy Corner: Astronomical Games

Accessible short articles on astronomical subjects. I particularly like the one on finding your way home from the centre of the galaxy.

to amusements astronomy ... on 03 January 2007

The C.L.I.V.E. Project

Point a laser at Iridium flashes automatically.

to astronomy electronics embedded satellite ... on 14 May 2006