Fraser Cain on Nostr: Transits are a rare occurrence when objects line up perfectly in the sky. NASA's ...

Transits are a rare occurrence when objects line up perfectly in the sky. NASA's Perseverance rover was fortunate to see three solar transits recently: Mars's moons, Phobos, Deimos, and Planet Mercury. These transits allow astronomers to refine their understanding of the shapes of the moons and planets and continue to confirm Einstein's gravity predictions. Phobos is slowly drifting toward Mars and will crash into the planet millions of years from now.

https://photojournal.jpl.nasa.gov/catalog/PIA26248