At 22:09 UT on June 5, 2012 the planet Venus will appear as a small, dark disk moving across the face of the Sun. The transit will finish at 04:49 UTC on June 6 (exact time depends on location of observer).

Clouds permiting, it may be visible to observers in the UK from dawn (about 03:46 UT in London).

This will be the last time the planet Venus will make the trek across the face of the sun as seen from Earth until the year 2117.

Note: Observing the Sun directly without appropriate protection can damage or destroy retinal cells, causing temporary or permanent blindness.

Clint Bradford K6LCS has posted a collection of URL’s where you should be able to watch the Venus transit online from sites around the world.

NASA (USA) http://venustransit.nasa.gov/2012/transit/

NASA Edge http://www.nasa.gov/multimedia/podcasting/nasaedge/index.html

University of Barcelona  (from a telescope in Norway) https://gaia.am.ub.es/serviastro/www/html/venus2012/live/index.html

National Solar Observatory http://venustransit.nso.edu/live.html

Exploratorium  (via the Mauna Loa Observatory) http://www.exploratorium.edu/venus/

NASA TV http://www.nasa.gov/ntv

Coca Cola Space Science Center (from Australia) http://www.ccssc.org/transit2012.html

Bareket observatory (Israel)
http://www.bareket-astro.com/live-astronomical-web-cast/live-free-venus-transit-webcast-6-june-2012.html

Mt. Lemmon Sky Center http://skycenter.arizona.edu/annoucement/live

Astronomers Without Borders (from Mt. Wilson, California)
http://www.astronomerswithoutborders.org/projects/transit-of-venus/live-webcast.html

The 2012 Transit of Venus using HAM Radio http://aprs.org/VenusTransit2012.html

Transit of Venus Special Event June 6, 2012
http://www.southgatearc.org/news/may2012/transit_of_venus_special_event.htm

Ultra-high Definition video recording of 2012 Venus Transit
http://www.nasa.gov/multimedia/videogallery/index.html?media_id=145648241