关于这张图
This collage represents a selection of planetary radar observations of asteroid 2008 OS7 that were made the day before its close approach with our planet on Feb. 2, 2024. The stadium-size near-Earth object passed at a distance of about 1.8 million miles (2.9 million kilometers, or 7 ½ times the distance between Earth and the Moon). Scientists at NASA's Jet Propulsion Laboratory used the powerful 230-foot (70-meter) Goldstone Solar System Radar antenna at the Deep Space Network's facility near Barstow, California, to capture these images. The observations will help scientists better understand …
