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  • In Depth | Asteroids – NASA Solar System Exploration
    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 The total mass of all the asteroids combined is less than that of Earth's Moon
  • Asteroids, Comets Meteors - NASA Solar System Exploration
    Our solar system’s small bodies – asteroids, comets, and meteors – pack big surprises These chunks of rock, ice, and metal are leftovers from the formation of our solar system 4 6 billion years ago
  • In Depth | Perseids – NASA Solar System Exploration
    Meteors come from leftover comet particles and bits from broken asteroids When comets come around the Sun, they leave a dusty trail behind them Every year Earth passes through these debris trails, which allows the bits to collide with our atmosphere and disintegrate to create fiery and colorful streaks in the sky The Comet
  • 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 | 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
  • In Depth | Oumuamua – NASA Solar System Exploration
    The first known interstellar object to visit our solar system, 1I 2017 U1 ‘Oumuamua, was discovered Oct 19, 2017 by the University of Hawaii’s Pan-STARRS1 telescope, funded by NASA’s Near-Earth Object Observations (NEOO) Program, which finds and tracks asteroids and comets in Earth’s neighborhood
  • Solar System Exploration Stories - NASA Science
    Solar System Exploration Stories Filters The Solar System Asteroids Apophis Arrokoth Bennu
  • RPS 3D Viewer - 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 | Sun – NASA Solar System Exploration
    The Sun orbits the center of the Milky Way, bringing with it the planets, asteroids, comets, and other objects in our solar system Our solar system is moving with an average velocity of 450,000 miles per hour (720,000 kilometers per hour)
  • Solar System Exploration
    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





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