Extremely rare transit of Venus to occur on June 5, 2012

A few hours before sunset on June 5th, 2012 residents of the Washington, DC metropolitan area will have a chance to witness one of the rarest celestial phenomena known: a “Transit of Venus”.

Perseid Meteor Shower Peaks Tuesday, Aug. 12

(PhysOrg.com) -- It's time once again for nature to put on its late-summer fireworks show: the Perseid meteor shower. This year's best viewing will be before dawn on Aug. 12, with a second chance after sunset that night, ...

What makes Mars sunsets different from Earth's?

Even robots can't tear their eyes from a beautiful sunset. NASA's Mars Curiosity rover pointed its high resolution mast camera at the setting sun to capture this 4-image sequence on April 15 at the conclusion of the mission's ...

Venus invades the Pleiades

This week the second planet from the sun will pass directly in front of the Pleiades star cluster. It's a rare sunset conjunction that's easy to find with the unaided eye, but best seen through binoculars or a small telescope.

See Mercury at sunset

The timing couldn't be better. Just as NASA's MESSENGER probe is about to enter orbit around Mercury, the innermost planet is popping out of the twilight for its best apparition of 2011.

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