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orbit

mars

NASA’s Maven Spacecraft Enters Mars Orbit

NASA’s Maven spacecraft entered orbit around Mars for an unprecedented study of the red planet’s atmosphere following a 442 million-mile journey that began nearly a year ago.

09/22/2014

UNSPECIFIED - SEPTEMBER 07: Venus begins to transit the face of the sun, on June 8, 2004. The image shows the mysterious black drop effect. (Photo by Babek Tafreshi/SSPL/Getty Images)

Stargazers Watch The Transit Of Venus, A Rare Celestial Event

It was a once-in-a-lifetime sighting up in the sky. The transit of Venus—when the planet passes in front of the sun—is a rare phenomenon.

06/05/2012