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SUTHERLAND OBSERVING STATION
NASA captures detailed images of passing asteroids, enhancing insights on planetary defenceNASA's JPL recently used radar to capture images of two passing asteroids. Asteroid 2011 UL21, discovered by Catalina Sky Survey in 2011, p...
Are we safe? NASA tracking monster 1.5-km-wide asteroid heading towards earthNASA's Jet Propulsion Laboratory used radar to study 2011 UL21, a 1.5 km-wide binary with a moonlet, on June 27. On June 29, they examined ...