These images represent radar observations of asteroid 99942 Apophis on March 8, 9, and 10, 2021, as it made its last close approach before its 2029 Earth encounter that will see the object pass our planet by less than 325 000 kilometres.
NASA Deep Space Network’s Goldstone Deep Space Communications Complex near Barstow, California, and the Green Bank Telescope in West Virginia used radar to precisely track Apophis’ motion, gathering data that rules out any chance of Earth impact for at least a century.