NASA’s NEO Surveyor telescope will launch in 2027 to find dangerous asteroids that current telescopes miss, strengthening planetary defense.

Asteroid 2026 CU1 will sweep past Earth this week at high speed, close enough to attract attention yet deemed safe, raising fresh questions about how well we watch the skies.

Overall, Didymos is nearly 200 times more massive than its smaller companion, which explains why shifting the larger asteroid system takes such an enormous amount of force. The sheer inertia of Didymos means that the barycenter deflection of its entire system was just a tiny fraction of the deflection felt locally by Dimorphos.

NASA's Jet Propulsion Laboratory reports that the near-Earth asteroid 2021 ER will approach Earth on Friday for a safe yet close flyby. The asteroid is roughly 44 feet wide, which equals the

Estimating a mass for a potentially hazardous asteroid (PHA) is perhaps the single most important thing to understand about it, after its trajectory. Actually doing so isn't easy though, as the mass for objects in the tens to hundreds of kilometers in size are too small to have their mass calculated by traditional radio-frequency tracking techniques.