关于这张图
The first cored sample of Mars rock is visible (at center) inside a titanium sample collection tube in this from the Sampling and Caching System Camera (known as CacheCam) of NASA's Perseverance rover. The image was taken on Sept. 6, 2021 (the 194th sol, or Martian day, of the mission), prior to the system attaching and sealing a metal cap onto the tube. The image was taken so the cored-rock sample would be in focus. The seemingly dark ring surrounding the sample is a portion of the sample tube's inner wall. The bright gold-colored ring surrounding the tube and sample is the "bearing race," a…
