New images from the Curiosity rover on Mars show one of the planet's moons on the move.
Phobos, the larger of Mars' two moons, passes directly in front of the planet's smaller moon Deimos, which is near the center of the screen.
It's the first time that a Mars mission on the planet's surface captured images of one moon eclipsing the other. The photographs will help researchers sharpen their knowledge of the moons' orbits, NASA said. While Phobos' orbit is slowly getting closer to Mars, the orbit of Deimos may be moving away from the planet.
The images were taken on August 1. The video is sped up, but the pass took a little less than a minute.