Ka-hortagga saameynta "Asteroid" waxaa ka mid ah dhowr habab oo ay ku yaalaan meelo u dhow Earth (NEO), oo looga hortagi karo dhacdooyinka waxyeellada burburay. Saameyn ku filan oo weyn oo ay sameeyaan astero-yare ama NEOs kale ayaa keena, iyada oo hadba ku xiran tahay saameynta ay ku leedahay, saunamis weyn, dabeylo fara badan iyo jiilaal saameeya saameeynta iftiinka iftiinka qoraxda ee saameeya badeecooyin badan oo dhagax weyn oo dhagax ah, iyo qashin kale, stratosphere. Iskuduwaha udhaxeeya Dunida iyo qiyaastii 10 kilomitir oo ballaadhan 66 milyan oo sanno ka hor ayaa loo maleynayaa inay soo saartay Qodobka Chicxulub Crater iyo Cretaceous-Paleogene dhacdada, oo si ballaaran loo xilsaaray in la baabi'iyo inta badan dinosaurs. Near Earth Object Surveillance Satellite Near-Earth Asteroid Tracking Near-Earth Object Camera NEODyS Orbit@home Pan-STARRS Sentinel Space Telescope Sentry (monitoring system *B612 Foundation Japan Spaceguard Association