Nasa; it’s new mission

[Jitendra Hydonus]

https://apple.news/AcvGvXTaSTQq4jjDS4-k73Q

Planetary defense
Planetary defense is the tracking and potential deflection of hazardous asteroids, comets, and other large bodies that might strike Earth. In public surveys, planetary defense always ranks highly among choices of what NASA should focus on, and the US Congress has asked the space agency to identify all asteroids with a diameter of 140 meters or greater. That is an object large enough to destroy a city on Earth.