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Phobos is the larger of Mars' two moons and is 17 x 14 x 11 miles (27 by 22 by 18 kilometers) in diameter. It orbits Mars three times a day, and is so close to the planet's surface that in some locations on Mars it cannot always be seen.

The Orbital Docking System (ODS) on the space shuttle principally contains two rings, referred to as the guide ring and the base ring. Three petals on the guide ring each contain a capture latch responsible for the initial soft capture of the ISS. The soft capture first connects the two vehicles, but not rigidly.

There are eight planets in the solar system. The four inner terrestrial planets are Mercury, Venus, Earth, and Mars, all of which consist mainly of rock. The four outer planets are Jupiter, Saturn, Neptune, and Uranus, giant planets that consist mainly of either gases or ice.

Did you know sound works differently on Mars than it does on Earth? Mars has a different atmosphere than Earth, so sounds on the Red Planet would sound a bit different and be more muffled. NASA’s Mars Perseverance rover has two microphones that record sounds on the Red Planet. Since its landing in February 2021, the rover has captured sounds such as dust devils, the whir of the Ingenuity Mars Helicopter in flight, and the sound of its wheels crunching over the rocky Martian terrain.