A midlevel solar flare erupts from the left side of the sun's disk on Aug. 24, in an extreme ultraviolet image captured by NASA's Solar Dynamics Observatory. Solar flares can disrupt communications and power grids, but this M5 flare was not directed at Earth.
NASA astronaut Steve Swanson captured this dramatic image of swirling auroral displays from aboard the International Space Station. The station's robotic arm can be seen folded at the top of the frame. The picture was posted on Twitter on Aug. 27.
Perseid meteors and stars light up the night sky above Spain's Sierra Norte de Madrid mountains in this multiple-exposure image from the early hours of Aug. 12. The Perseids occur every August when Earth passes through the debris and dust left behind by Comet Swift-Tuttle.
A cloud floats over South America's Andes Mountains in an image tweeted by German astronaut Alexander Gerst from the International Space Station on Aug. 3.
The International Space Station's robotic arm prepares to release Orbital Sciences Corp.'s Cygnus cargo craft on Aug. 15, after a monthlong visit to the orbital outpost. It took weeks to unload 1.5 tons of cargo from the Cygnus and fill it back up with trash for disposal.
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