A Mars scientist shares the inside story of the NASA Curiosity rover's poignant first photo of Earth and Mars moon Phobos together in the twilight sky.

It is the first time ever the two have been captured together from the surface of Mars. NASA's Curiosity Mars rover used its Mast Camera, or Mastcam, to capture the view of Earth setting while Phobos is rising.

The Curiosity rover captured this image on Sept. 9, 2024, during its 4,295th Martian day (called a "sol") on Mars. It's been rumbling over Martian terrain for over 12 years, and is currently ascending the 3.4-mile (5.5-kilometer) high Mount Sharp, a place that once experienced dramatic Martian floods.