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  • In Depth | Sun – NASA Solar System Exploration
    In Depth 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 Without the Sun’s energy, life as we know it could not exist on our home planet
  • 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 | 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 | 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
  • Jupiter - NASA Solar System Exploration
    Facts About Jupiter Jupiter is the largest and oldest planet in our solar system If Jupiter was a hollow shell, 1,000 Earths could fit inside Jupiter has the shortest day in the solar system, taking about 9 9 hours to spin around once on its axis
  • In Depth | 1P Halley – NASA Solar System Exploration
    Comet Halley moves backward (opposite to Earth's motion) around the Sun in a plane tilted 18 degrees to that of the Earth's orbit Halley's backward, or retrograde, motion is unusual among short-period comets, as its greatest distance from the Sun (aphelion) is beyond the orbit of Neptune
  • In Depth | Asteroids – NASA Solar System Exploration
    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
  • Solar System Exploration
    Solar System Facts Our solar system includes the Sun, eight planets, five officially named dwarf planets, hundreds of moons, and thousands of asteroids and comets Our solar system is located in the Milky Way, a barred spiral galaxy with two major arms, and two minor arms
  • Stardust Stardust NExT - NASA Science
    The spacecraft was launched into a heliocentric orbit that would bring it around the Sun and past Earth for a gravity-assist maneuver to direct it to Wild 2 after a flyby of the minor planet Annefrank in November 2002





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