LightSail team prepares for tests of mylar space wonder

The concept of LightSail—spacecraft designed to propel through space on beams of sunlight— pushed through by nothing but the pressure of sunlight—has been around for years but this month made special news because the ...

US cyber commander says hackers to 'pay a price'

The US strategy of "deterrence" for cyber-attacks could involve a wide range or responses, potentially including the use of conventional weapons, the nation's top cyber-warrior said Monday.

Powerful new radio telescope array searches the entire sky 24/7

A new radio telescope array developed by a consortium led by Caltech and now operating at the Owens Valley Radio Observatory has the ability to image simultaneously the entire sky at radio wavelengths with unmatched speed, ...

Ceres animation showcases bright spots

The mysterious bright spots on the dwarf planet Ceres are better resolved in a new sequence of images taken by NASA's Dawn spacecraft on May 3 and 4, 2015. The images were taken from a distance of 8,400 miles (13,600 kilometers).

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