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  1. Solar System Exploration - Science@NASA

    Dec 4, 2025 · 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 …

  2. Solar System Facts - NASA Science

    Mar 12, 2025 · 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 …

  3. About the Planets - Science@NASA

    May 28, 2025 · Our solar system has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. There are five officially recognized dwarf planets in our solar system: Ceres, …

  4. Our Solar System - NASA Science

    Mar 15, 2016 · Our solar system is made up of a star—the Sun—eight planets, 146 moons, a bunch of comets, asteroids and space rocks, ice, and several dwarf planets, such as Pluto.

  5. Sun - NASA Science

    Dec 17, 2025 · The Sun's gravity holds the solar system together, keeping everything – from the biggest planets to the smallest particles of debris – in its orbit. The connection and interactions between the …

  6. Sun: Facts - NASA Science

    Apr 22, 2025 · The Sun is the only star in our solar system. It is the center of our solar system, and its gravity holds the solar system together. Everything in our solar system revolves around it – the …

  7. Planet Sizes and Locations in Our Solar System - Science@NASA

    Apr 22, 2025 · Venus is the sixth largest planet in the solar system. Venus is about the same width as Earth, and has an equatorial diameter of about 7,521 miles (12,104 kilometers).

  8. Solar System: Exploration - Science@NASA

    Nov 4, 2024 · "We have so many different types of objects in the solar system, from planets and moons to asteroids and comets. We can study each one of those, and they all have something they can tell …

  9. How Big Is the Solar System? - Science@NASA

    Feb 1, 2020 · Needless to say, our solar system doesn't fit real well on paper — or a Web site for that matter. Scientists figured out a while ago that writing out those huge numbers wasn't the best use of …

  10. Chapter 1: The Solar System - Science@NASA

    Jan 22, 2025 · Upon completion of this chapter, you will be able to classify objects within the solar system, state their distances of in terms of light-time, describe the Sun as a typical star, relate its …