Venus will pass directly between the sun and earth on Tuesday in the last Transit of Venus of the 21st century. Beginning at around 6:04 p.m. EST, Venus can be seen passing across the sun in a display that will last for more than six hours. (See when the transit will be visible in your area here.) Scientists are reminding amateur astronomers to protect their eyes from the sun's UV rays. The next Transit of Venus will not occur until December 2117.
Read more at The Guardian