NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, is being prepared for the final journey to its launch pad on Kwajalein Atoll in the central Pacific Ocean.

Final pre-launch preparations are underway for NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR. The mission, which will use X-ray vision to hunt for hidden black holes, is scheduled to launch no earlier than June 13 from Kwajalein Atoll in the Marshall Islands.

NASA's Jet Propulsion Laboratory, Pasadena, Calif., invites the public to its annual Open House on Saturday, June 9, and Sunday, June 10, from 9 a.m. to 4 p.m.

Its construction now complete, the science instrument that is the heart of NASA's Orbiting Carbon Observatory-2 (OCO-2) spacecraft - NASA's first mission dedicated to studying atmospheric carbon dioxide - has left its nest at NASA's Jet Propulsion Laboratory in Pasadena, Calif., and has arrived at its integration and test site in Gilbert, Ariz.

With its daily supply of solar energy increasing, NASA's durable Mars Exploration Rover Opportunity has driven off the sunward-tilted outcrop, called Greeley Haven, where it worked during its fifth Martian winter.