Asteroids pass by each day. Luckily, large asteroid crashes are uncommon.
Every year, over 3,000 near-Earth asteroids (NEAs) are found by NASA's survey telescopes. With the use of more powerful and sophisticated telescopes, the likely discovery rate will continue to increase. To date, over 36,000 NEAs have been discovered by telescopes that search the night sky, according to NASA’s Jet Propulsion Laboratory.