An Orbital Sciences Corp. Pegasus XL air-launched rocket is in final preparation to send a NASA scientific satellite into polar orbit to study a poorly understood region of the Sun's atmosphere in unprecedented detail. The Interface Region Imaging Spectrograph (IRIS) (see image) will combine an ultraviolet telescope and a multi-channel imaging spectrograph to study the interface region between the visible surface of the Sun and its upper atmosphere, which is the source of most of the Sun's UV radiation.

NASA's long-lived Opportunity rover is rolling toward a new destination at Endeavour Crater on Mars, following one of the nine-year mission's most striking discoveries, a rock rich in clay minerals that points to an early, biologically friendly era dominated by water with a neutral chemistry. Opportunity's internal examination of the rock Esperance in a region known as Cape York on the crater's rim has produced findings strikingly similar to those from rock analysis by NASA's Curiosity rover at the Yellowknife Bay region of distant Gale Crater.

With 5th flight underway, plans for a space station in 2 years.

Test pilots working for Scaled Composites and Virgin Galactic expect to expand the SpaceShipTwo flight envelope rapidly this year, and to reach the edge of space before the end of December.

Switzerland's Solar Impulse team overcame storms in the Midwest U.S. to fly the solar-powered prototype, HB-SIA, from Dallas/Fort Worth International Airport to Lambert St. Louis International Airport on the third leg of its Across America 2013 cross-country flight.

Turkish strategy bolsters military capability, domestic industry

In what could be the biggest shake-up of U.S.-funded science, technology, engineering and mathematics (STEM) promotional efforts since the dawn of the space age, the Pentagon, NASA and Department of Homeland Security are set to lose many of their STEM programs.

Robots scout space for human explorers