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  • In Depth | Our Solar System – NASA Solar System Exploration
    The planetary system we call home is located in an outer spiral arm of the Milky Way galaxy 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
  • 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
  • Pluto By the Numbers - NASA Solar System Exploration
    Pluto was once our solar system's ninth planet, but has been reclassified as a dwarf planet It's located in the Kuiper Belt
  • In Depth | Ganymede – NASA Solar System Exploration
    The discovery, along with his discovery of three other large moons around Jupiter, was the first time a moon was discovered orbiting a planet other than Earth The discovery eventually led to the understanding that planets in our solar system orbit the Sun, instead of our solar system revolving around Earth
  • 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 | Moons – NASA Solar System Exploration
    Moons of the Inner Solar System Earth's Moon probably formed when a large body about the size of Mars collided with Earth, ejecting a lot of material from our planet into orbit Debris from the early Earth and the impacting body accumulated to form the Moon approximately 4 5 billion years ago (the age of the oldest collected lunar rocks)
  • Mars By the Numbers - NASA Solar System Exploration
    Mars is the fourth planet from the Sun, and the seventh largest It’s the only planet we know of inhabited entirely by robots
  • In Depth | Europa – NASA Solar System Exploration
    The similarities don’t end there Each planet in the inner solar system is less dense than its inner neighbor – Mars is less dense than Earth, which is less dense than Venus, which is less dense than Mercury The Galilean moons follow the same principle, being less dense the farther they are from Jupiter
  • 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
  • Jupiter 3D Model – NASA Solar System Exploration
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