Astronomers discover skyscraper-size asteroid hidden in sun's glare — and it's moving at a near-record pace

Astronomers discovered a 2,300-foot-wide asteroid named 2025 SC79 hidden in the sun's glare, making it the second-fastest orbiting asteroid in the solar system. The skyscraper-sized space rock completes an orbit around the sun every 128 days and travels entirely within Venus' orbit, occasionally crossing Mercury's path. These "twilight asteroids" are particularly dangerous because they're extremely difficult to detect yet could pose serious impact threats to Earth if their trajectories change.