Astrophysics resources

NASA Extragalactic Database
returns all catalogue matches for a galaxy, given its position
also lists observations from the literature

VizieR
an online catalogue search tool

CDS
a repository of downloadable catalogues

Cosmology Calculator
a conversion tool between distance and redshift for standard Λ-CDM cosmologies

Science news

NASA's Astronomy Picture of the Day

The Naked Scientists

The Naked Astronomy podcast

NASA Science News

NASA SpaceWeather Site

The latest EUMETSAT image for central Europe

Space science news from Heavens Above

Science opinion

Bad Science
Ben Goldacre's analysis of science in the media

The e-Astronomer
otherwise known as Andy Lawrence

A free online book
about the UK's future energy needs

Chris Lintott's blog
from the maker of Galaxy Zoo

Alistair Reid's blog
of scientific curiosities and nuclear power

Astronomy organisations

The Astrophysics Group of the Cavendish Laboratory, Cambridge

The Institute of Astronomy, Cambridge

The Royal Astronomical Society

The American Astronomical Society

The British Astronomical Association

Free software for amateur astronomy

Stellarium
an open source, free, planetarium program for Windows and Linux

Registax
an image stacking tool; Windows only, free, not open source

Iris
a powerful astronomical image processing tool; Windows only, free, not open source

Technology news

The Register

Slashdot