Chances Of An Asteroid Hitting Earth In 2024. The findings were part of the fifth biennial planetary defence. — imagine if scientists discovered a giant asteroid with a 72% chance of hitting the earth in about 14 years — a space rock so big that it could not only take out a city.
How often do asteroids threaten earth? — each month, nasa’s planetary defense coordination office releases a monthly update featuring the most recent figures on nasa’s planetary defense efforts,.