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CAPE CANAVERAL, Fla. – An asteroid the size of a school bus is headed our way, but NASA says the space rock will zoom safely past Earth on Thursday. The newly discovered asteroid will come within 13,000 miles (22,000 kilometers) of Earth, well below many of the communications satellites orbiting the planet, scientists said this week. Scientists estimate the asteroid is between 15 feet and 30 feet (4.5 meters to 9 meters). Asteroid 2020 SW, as it is known, was discovered last Friday by the Catalina Sky Survey at the University of Arizona in Tucson. ___The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education.

When I first read about Asteroid 2020 SW making a close pass by Earth, I decided to check with Tony Rice . He’s an ambassador to NASA’s Jet Propulsion Laboratory, and we rely on him most often for space-related news. Rice replied with information from NASA’s JPL that confirms an asteroid (15 to 30 feet wide) will make a “close” pass by Earth Thursday morning. These satellites orbit the earth at roughly 20,000 miles away. After its close pass over the Pacific Ocean, the asteroid will continue its orbit around the sun only to return near Earth (not as close) in 2041.