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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 and Saturn and the ice giants Uranus and Neptune have dozens of moons.
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; dozens of moons; and millions of asteroids, comets, and meteoroids.
5 thg 6, 2025 · Featured Resources Mercury's Caloris Basin Beyond Our Solar System Poster - Version B Sunset on Mars (Viking 1) more resources › Page Updated: April 1, 2024
Part of NASA’s Mars Science Laboratory mission, Curiosity is the largest and most capable rover ever sent to Mars. Curiosity’s mission is to answer the question: did Mars ever have the right environmental conditions to support small life forms called microbes?
5 thg 6, 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.
5 thg 6, 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.
EXECUTIVE SUMMARY Mars Polar Lander (MPL) and the two Deep Space 2 (DS2) probes were launched using a single launch vehicle from Kennedy Space Center on 3 January 1999. Upon arrival at Mars, communications ended according to plan as the three spacecraft prepared to enter the Martian atmosphere.
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Most of this ancient space rubble can be found orbiting our Sun between Mars and Jupiter within the main asteroid belt. Asteroids range in size from Vesta – the largest at about 329 miles (530 kilometers) in diameter – to bodies that are less than 33 feet (10 meters) across.
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 years; at that rate, it will either crash into Mars in 50 million years or break up into a ring.
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