Curiosity periodically looks across the Martian landscape at the horizon and takes a sequence of images in order to search for transient events that lift dust into the atmosphere. On sol 2215 (30 October 2018), it got lucky, catching several dust devils crossing the view. In this animation, the images have been processed to emphasize changes from the static landscape, making the hard-to-spot dust devil more visible. The animation covers a period of about 30 minutes.
Near Mars' equinoxes, the moons of Mars pass between the Sun and the planet, drawing a line of penumbral eclipses across the surface. Here, Phobos' penumbra passes across Mount Sharp, to the south of Curiosity, on sol 1694 (May 12, 2017). Two different Navcam images show the difference between the ordinary-lit mountain and the view when it's in Phobos' shadow.
Curiosity captured three images of Earth setting in the western sky after sunset on sol 529 with its higher-resolution Mastcam-100. Here, the images have been subtracted to cancel out noise in the camera detector, revealing Earth's bright dot in motion.