Near Earth Objects

Science

A near miss asteroid is a near-Earth object that passes close to Earth without posing an impact threat. This guide explains how such objects are defined, tracked, and assessed,...

planetary-defense

Apophis, a near-Earth asteroid roughly 340 meters across, will make a close approach in 2029 that will come within about 32,000 kilometers of Earth, passing inside some satellit...

Science

By 2032, at least one sizable near-Earth object tracked by NASA will make a close approach, but current impact probabilities remain extremely low. This overview explains how orb...

Science & Space

Objects strike Earth constantly as meteorites, but large, damaging impacts are exceptionally rare. Most arrive as small fragments that burn up or fall harmlessly, while only ast...