The Mastcam-Z camera on NASA’s Perseverance rover captured the Martian moon Phobos as it eclipsed the sun. Credit: ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. As Phobos, one of ...

The conventional wisdom about Mars’ small and misshapen moons, Phobos and Deimos, is that they were either created like Earth’s Moon — carved out of the planet by an impact with a huge object — or ...

Where did the moons of Mars come from? That’s a question scientists still can’t answer. We know that Earth’s moon was likely formed from a giant impact on our planet about 4.5 billion years ago. Some ...

While there are over 200 moons in our solar system, only three exist around the inner terrestrial planets, and two belong to the planet Mars. These two are Phobos and Deimos, and they are small, ...

Mars' two moons, Phobos and Deimos, are small, irregular, but orbit in the same equatorial plane as the red planet. Although they've long been thought to be captured asteroids, those orbits would be ...

The long, shallow grooves lining the surface of Phobos are likely early signs of the structural failure that will ultimately destroy this moon of Mars. The long, shallow grooves lining the surface of ...

Scientists have long debated the cause of the distinctive grooves on the surface of Mars' moon Phobos. One leading theory has it that the lines are signs of structural failure as the tiny body is ...

The Perseverance Mars rover's Mastcam-Z camera the Martian moon Phobos transit the Sun. See real-time and time-lapsed views ...