There's a giant camera(opens in a new tab) orbiting Mars.
It's attached to NASA's Mars Reconnaissance Orbiter and can spot things as small as a kitchen table (including robotic rovers). It's aptly called the High Resolution Imaging Experiment, or HIRISE. And it recently captured a brilliant view of a Martian crater.
The image, taken in late 2021 but released on Jan. 20, shows a crater (likely created by an ancient impact) filled with vivid dunes. Mars may often be some 140 million miles from Earth, or at times much farther, but Earth-like geologic processes continually transpire there.
The crater, while an impressive feature in the Martian desert, also serves an important purpose for planetary scientists. It accurately marks the location of zero longitude(opens in a new tab) on Mars, the line separating Mars' western and eastern hemispheres.
On Earth, that point is marked by the Royal Observatory Greenwich(opens in a new tab) in the UK. But on Mars, a place brimming with evidence of past asteroid impacts, a crater must do.
