NASA to observe asteroid as wide as Empire State Building near-Earth encounter
About 5-1/2 years from now, astronomers predict, an asteroid about as wide as the Empire State Building is tall will streak through space within 20,000 miles (32,200 km) of Earth, the closest any celestial object of that size will have come to our planet in modern history. (Photo: Shutterstock (For representational purposes only)) {{^userSubscribed}} {{/userSubscribed}} …