we could calculate in a cosmic sense where we are, all from the transit of venus, that briefest transit across the giant sun of little itty-bitty venus. from such a little thing comes such a huge thing to know. how big the universe that we re in is, or at least our solar system. the transit of venus happens rarely. edmond haley died without ever seeing one, didn t happen until half a century after his theory was published. but his theory is right. the last time this event happened before this century was in the 1800s. but it is about to happen again. since we are the kind of tv show that has a really friendly in-house astrophysicist to explain all of this, we are all in luck. watch. so venus transiting the sun is going to look like that. like a little raisin or a tick. right. tiny tiny. you won t be able to see this with your eyes. you can see it with telescopes. you shouldn t try to see it with