No need to break a sweat or severely damage your vision this afternoon, members of The Exploratorium are hosting a live webcast of Venus' transit across the Sun from Hawaii's Mauna Loa Observatory.
The webcast has a live telescope feed to the tune of audio commentary every 30 minutes and a sound composition being created from the video of the transit in real time. It's expected to last about 6.5 hours (beginning at 22:00 UT).
Check out the live webcast here.