Mercury Transit Promo

On Monday, May 9th at 7:12am Eastern, the planet Mercury will appear against the face of the sun as a small black dot while passing between Earth and the Sun. This phenomenon, known as a transit takes place about 13 times a century. Join NASA Experts for a for a live one-hour televised program at 10:30 a.m. Eastern on NASA Television Channel 102 or watch NASA TV online at .