美国航天局的近地天体WISE小行星跟踪任务于8月8日结束,在近地天体监测方面留下空白。 NASA's NEOWISE asteroid-tracking mission ended on August 8, leaving a gap in NEO monitoring.
美国航天局近地天体WISE小行星跟踪任务于8月8日结束,在监测小行星和彗星等近地物体方面留下空白。 NASA's NEOWISE asteroid-tracking mission ended on August 8, leaving a gap in monitoring near-Earth objects (NEOs) like asteroids and comets. 该飞行任务在所研究的3 000个近地天体中发现了200多个近地天体,近地天体探测器定于2027年发射,目的是在5年期间发现直径大于140米的所有近地天体的三分之二。 The mission discovered over 200 of 3,000 NEOs it studied, with NEO Surveyor set to launch in 2027, aiming to discover two-thirds of all NEOs larger than 140 meters in diameter over a five-year period. 飞行任务的结束并不构成重大威胁,因为这种大小撞击地球的小行星每20 000年撞击地球一次,但为今后的行星防御努力提供了基础。 The mission's end does not pose a significant threat, as asteroids of this size impact Earth every 20,000 years, but provides a foundation for future planetary defense efforts.