水手峡谷:火星的大峡谷
2020 May 24 Valles Marineris: The Grand Canyon of Mars Image Credit: NASA, USGS, Viking Project Explanation: The largest canyon in the Solar System cuts a wide swath across the face of Mars. Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparis...