Venus Transit 2004
- The European Southern Observatory describes and invites participation in a project to reenact the determination of the solar parallax using a transit of Venus.
- http://www.eso.org/outreach/eduoff/edu-prog/catchastar/casreports-2004/rep-118/

The Next Transits of Venus
- Brief description with diagrams of the 2004 and 2012 transits as seen from Guernsey.
- http://www.astronomy.org.gg/venustransitsa.htm

Sun-Earth Day 2004 Venus Transit
- Information and resources for students, educators, museums, scientists and amateur astronomers. Animations, facts, graphs, maps, historical articles, and pointers to webcasts and other ways to view the transit.
- http://sunearth.gsfc.nasa.gov/sunearthday/2004/

Transit of Venus
- Safety, viewing techniques, FAQ, and historic expeditions pertaining to this June 8, 2004 event.
- http://www.transitofvenus.org

Transit of Mercury Live images
- Webcam announcement from Worth Hill Observatory in the UK.
- http://home.freeuk.com/dgstrange/transit.mercury.2003/

Telescopes Aim at Mercury
- BBC News article anticipating the 2003 transit.
- http://news.bbc.co.uk/1/hi/sci/tech/2994347.stm

Transits of Mercury and Venus
- Brief description of the upcoming transits, with information about visibility in Australia and New Zealand.
- http://www.rasnz.org.nz/Transits.htm

Internet Project - Transit of Venus
- Invites students, teachers, and amateur astronomers to participate in studies of the transit of 2004.
- http://agnes.dida.physik.uni-essen.de/~backhaus/VenusProject.htm

Transit of Venus, 2004
- A table showing predicted time and path of the transit for various locations throughout the world. In PDF format from the US Naval Observatory.
- http://aa.usno.navy.mil/data/docs/Venus2004.pdf

Orpington Astronomical Society - Transit of Venus 2004
- Description of the event, explanation of timing, illustrations including "black drop effect".
- http://www.chocky.demon.co.uk/oas/venus.html