Among the challenges is modifying sensors designed to detect the heat from an incoming warhead so they can spot the much-cooler satellite, which has no heat source and is warmed only by the sun's rays.

CNN: Attempt to shoot down spy satellite to cost up to $60 million

The instruments aboard the satellite allowed scientists to spot close-in asteroids by picking up the heat they emit, Mainzer said.

CNN: NASA estimates 4,700 'potentially hazardous' asteroids

Miami's magic number for clinching home-court throughout the NBA playoffs remained at five, and the Heat already have the No. 1 spot in the Eastern Conference wrapped up.

NPR: Anthony Scores 50 As Knicks Beat Heat 102-90