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  • In Depth | Sun – NASA Solar System Exploration
    The Sun is a 4 5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system It’s about 93 million miles (150 million kilometers) from Earth and it’s our solar system’s only star
  • In Depth | Earths Moon – NASA Solar System Exploration
    During a "full moon," the hemisphere of the Moon we can see from Earth is fully illuminated by the Sun And a "new moon" occurs when the far side of the Moon has full sunlight, and the side facing us is having its night
  • In Depth | Moons – NASA Solar System Exploration
    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
  • 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
  • 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
  • Directory | Solar System Ambassadors - NASA Solar System Exploration
    On any given clear night in East Brunswick, New Jersey, you can find Isaac Osores, equipped with his telescope, observing planets, stars, and moons from his backyard It is through these sessions that he captures images and videos of these astronomical objects that are often shared through his social media accounts
  • In Depth | Saturn Moons – NASA Solar System Exploration
    Moon Mysteries Managed Enceladus and Titan get a lot of attention, but the Cassini mission also provided countless insights about dozens of Saturn’s other moons Cassini captures the first high-resolution glimpse of the bright trailing hemisphere of Saturn's moon Iapetus
  • The Sun By the Numbers – NASA Solar System Exploration
    The Sun is the star at the heart of our solar system Its gravity holds the solar system together, keeping everything – from the biggest planets to the smallest bits of debris – in its orbit
  • In Depth | Titan – NASA Solar System Exploration
    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
  • Europa By the Numbers – NASA Solar System Exploration
    Europa is one of the largest of Jupiter’s more than 90 moons It's the sixth-closest moon to the planet





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