Astronomers have discovered a 2,300-foot-wide (700 meters) asteroid hidden in the sun's glare, and it’s whizzing through our solar system at a near record-breaking pace.The skyscraper-size asteroid, named 2025 SC79, loops around the sun once every 128 days, giving it the second-fastest asteroid orbit in the solar system. It is also only the second known space object that orbits entirely inside of Venus' orbit, occasionally even crossing the orbit of Mercury.Scott Sheppard, an astronomer at the Carnegie Science research institute in Washington, D.C., first spotted 2025 SC79 on Sep. 27...To put its 2,300-foot diameter in context, the so-called "city-killer" asteroid...