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  • In Depth | Moons – NASA Solar System Exploration
    Saturn, Uranus and Neptune also have some irregular moons, which orbit far from their respective planets Saturn has two ocean moons – Enceladus and Titan Both have subsurface oceans and Titan also has surface seas of lakes of ethane and methane
  • In Depth | Saturn Moons – NASA Solar System Exploration
    The Voyager and Pioneer flybys of the 1970s and 1980s provided rough sketches of Saturn’s moons But during its many years in Saturn orbit, NASA’s Cassini spacecraft discovered previously unknown moons, solved mysteries about known ones, studied their interactions with the rings and uncovered new mysteries – including the discovery on an ocean moon with potential ingredients for life
  • In Depth | Titan – NASA Solar System Exploration
    In Depth Saturn's largest moon, Titan, is an icy world whose surface is completely obscured by a golden hazy atmosphere Titan is the second largest moon in our solar system Only Jupiter's moon Ganymede is larger, by just 2 percent Titan is bigger than Earth's moon, and larger than even the planet Mercury
  • In Depth | Enceladus – NASA Solar System Exploration
    Also, like some other moons in the extensive systems of the giant planets, Enceladus is trapped in what’s called an orbital resonance, which is when two or more moons line up with their parent planet at regular intervals and interact gravitationally Enceladus orbits Saturn twice every time Dione, a larger moon, orbits once
  • In Depth | Our Solar System – NASA Solar System Exploration
    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 Beyond our own solar system, there are more planets than stars in the night sky
  • In Depth | Earths Moon – NASA Solar System Exploration
    The brightest and largest object in our night sky, the Moon makes Earth a more livable planet by moderating our home planet's wobble on its axis, leading to a relatively stable climate It also causes tides, creating a rhythm that has guided humans for thousands of years The Moon was likely formed after a Mars-sized body collided with Earth several billion years ago Earth's Moon is the only
  • In Depth | Tethys – NASA Solar System Exploration
    Orbit Tethys orbits 183,000 miles (295,000 kilometers) from Saturn, taking 45 3 hours to circle the planet As with all but two of the major Saturnian moons, Tethys is tidally locked in phase with its parent planet — the same side always faces toward Saturn
  • In Depth | Uranus Moons – NASA Solar System Exploration
    Ariel has the brightest and possibly the youngest surface among all the moons of Uranus It has few large craters and many small ones, indicating that fairly recent low-impact collisions wiped out the large craters that would have been left by much earlier, bigger strikes Intersecting valleys pitted with craters scar its surface
  • Planet Compare - NASA Solar System Exploration
    NASA’s real-time science encyclopedia of deep space exploration Our scientists and far-ranging robots explore the wild frontiers of our solar system
  • In Depth | Phobos – NASA Solar System Exploration
    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





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