LightSail A

I was captivated by this photo of solar sails taken on June 8.

LightSailA

The image from The Planetary Society was featured on the Astronomy Picture of the Day for June 19, 2015. Described in part as:

Once considered the stuff of science fiction, sailing through space was suggested 400 years ago by astronomer Johannes Kepler who observed comet tails blown by the solar wind.

More can be read at both sites and on this blog entry.