There's a lot of excitement surrounding the "Transit of Venus," even though this rare astronomical event will yield little scientific value.
On Tuesday, Venus will cross the face of the sun. The transit will take about seven hours and begin at 6:09 p.m. EDT.
The next time Venus journeys across the sun will be in the year 2117, says Jack Lissauer, Kepler Mission co-investigator and planetary scientist at NASA Ames Research.
"This is the last chance for almost everybody unless we have huge medical advances," Lissauer says.
"SpaceX's Dragon capsule sits on a barge after being retrieved from the Pacific Ocean after splashdown.
Dragon splashed down in the Pacific Ocean on Thursday, May 31, 2012, at 11:42 a.m. EDT a few hundred miles west of Baja California, Mexico, marking a successful end to the first mission by a commercial company to resupply the International Space Station."Source: NASA