Oh, That Pesky Factor of Two

Venus to Appear in Once-In-A-Lifetime Event

On 5 and 6 June this year, millions of people around the world will be able to see Venus pass across the face of the Sun in what will be a once-in-a-lifetime experience.

Other than the fact that Venus made a transit in 2004; I got to see it and even got to see it with a telescope used in the 1874 and/or 1882 transit expeditions. So this is (for many of us; some people have been born since 2004) a twice-in-a-lifetime experience. However, if you missed the last one, this is it — you won’t get another chance until 2117. In the US, the sunset will interrupt the transit. For much of South America or western Africa (or anywhere in Antarctica), you’ll miss out if you stay where you are. Looks like Iceland has a unique situation of having sunset interrupt the middle of the transit, but will see at again at sunrise.

More information at Transit of Venus dot org.