AIR & SPACE MAGAZINE Craters, yes No, it’s not the moon. Image: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington September 30, 2009 Matt Hale Get the latest stories in your inbox every weekday.
/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/Mercury%20northern%20horizon-505.png)