World's Largest Digital Camera to Watch for Killer Asteroids
Brian Handwerk
for National Geographic News
Published June 22, 2010

If a planet-destroying asteroid is headed for Earth, scientists now have a much better chance of spotting it.

From its perch atop Hawaii’s dormant Haleakala volcano, the PS1 telescope, which boasts the world's largest digital camera, has begun full-time operations, snapping hundreds of high-resolution photos each day as it scans the sky for space rocks and strange stellar phenomena.