Watch Venus pass before the sun today

Jan Herold/Wikipedia

On Tuesday, June 5, Venus will transit the sun during sunset— and it will be 105 years until it happens again.

From about 6:06 to 8:33 p.m. Venus will cross in front of the sun, appearing as a small black speck — to be sure, you should not look for it without special sun-viewing instruments or shades, and if you do have access to a telescope, that's even better. 

You can also catch a webcast of the event at NASA starting at 5:45 p.m.

For more about the upcoming transit, I'll point you to Ars Technica's report (read it here) and NASA's special webpage for the event (see that here).