Oct 21, 2025 · Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited entirely by robots.

Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; …

Oct 21, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

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. Phobos is nearing Mars at a rate of six feet (1.8 meters) every hundred …

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Of the terrestrial (rocky) planets of the inner solar system, neither Mercury nor Venus have any moons at all, Earth has one and Mars has its two small moons. In the outer solar system, the gas giants Jupiter …

Apr 23, 2024 · We use a best of approach with images, selecting a key set of images that best tell the story of the planet, celestial object or spacecraft. Comprehensive planetary image libraries can be …

Oct 21, 2025 · Europa is one of the largest of Jupiter’s more than 90 moons. It's the sixth-closest moon to the planet.

Apr 27, 2010 · References: Lorenz, R. and C. Sotin (2010) The Moon that would be a planet, R., Scientific American, 302, 20-27. Brown R.H. et al. (2009) Titan from Cassini-Huygens, Springer, 535 pp.

The 3-mile-high (5-kilometer-high) mountain has multiple rock layers. Each layer reveals information about a different time in Mars’ history. Curiosity will study these layers for clues about ancient …