inexpensive spacecraft calledpe cube sats, about the size of a loaf of bread. they're making space exploration affordable to universities and businesses. >> reporter: last year about 150 spacecraft this size were launched. >> reporter: rex ridenoure's company ecliptic enterprises built this spacecraft for the company. >> it has never been done in a package this big, so it will be a first. >> we hope to kick start ape process where others take the technology and make it better and really start pushing the boundaries. >> reporter: the test flight scheduled for early may will last just a few weeks, but eventually lightsail could do what sailing ships once did on earth, enable exploration of distant and mysterious places. john blackstone, cbs news, san francisco. >> pelley: and that's the "cbs evening news" for tonight. for all of us at cbs news all around the world, good night. ne