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    asteroid
    /ˈast(ə)rɔɪd/

    noun

    • 1. a small rocky body orbiting the sun. Large numbers of these, ranging enormously in size, are found between the orbits of Mars and Jupiter, though some have more eccentric orbits.
    • 2. an echinoderm of the class Asteroidea, which comprises the starfishes.

    adjective

    • 1. relating to or denoting echinoderms of the class Asteroidea.

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  2. spaceplace.nasa.gov › asteroid › enWhat Is an Asteroid? | NASA Space Place – NASA Science for Kids

    Nov 8, 2024 · Scientists can learn about asteroids by studying meteorites: tiny bits of asteroids that have flown through our atmosphere and landed on Earth’s surface. Several NASA space missions have also flown by and observed asteroids.

  3. spaceplace.nasa.gov › asteroid-or-meteor › enAsteroid or Meteor: What's the Difference? - NASA Space Place

    Nov 8, 2024 · An asteroid is a small rocky object that orbits the Sun. A meteor is what happens when a small piece of an asteroid or comet, called a meteoroid, burns up upon entering Earth’s atmosphere. Read on to find out more and learn the difference between asteroids and comets, meteoroids and meteorites, and more!

  4. spaceplace.nasa.gov › menu › solarsystemAsteroid | NASA Space Place – NASA Science for Kids

    Nov 8, 2024 · Asteroid or Meteor: What's the Difference? Learn more about asteroids, meteors, meteoroids, meteorites, and comets! explore; What Is an Asteroid? And what can we learn from these space rocks in our solar system? explore; Glossary. Find definitions of space and Earth science terms . explore

  5. spaceplace.nasa.gov › search › asteroidAsteroid | NASA Space Place – NASA Science for Kids

    Nov 8, 2024 · Asteroid or Meteor: What's the Difference? Learn more about asteroids, meteors, meteoroids, meteorites, and comets! explore; What Is an Asteroid? And what can we learn from these space rocks in our solar system? explore; Play Bingo While Watching the Psyche Spacecraft Launch! During the launch broadcast, you can mark off the words ...

  6. spaceplace.nasa.gov › search › asteroidsAsteroids | NASA Space Place – NASA Science for Kids

    Nov 8, 2024 · Make asteroids you can eat! Make yummy potatoes look like asteroids. do; What Is an Asteroid? And what can we learn from these space rocks in our solar system? explore; Asteroid or Meteor: What's the Difference? Learn more about asteroids, meteors, meteoroids, meteorites, and comets! explore; Printed Product Downloads

  7. spaceplace.nasa.gov › orbits › enWhat Is an Orbit? | NASA Space Place – NASA Science for Kids

    Nov 8, 2024 · The Short Answer: An orbit is a regular, repeating path that one object in space takes around another one. An object in an orbit is called a satellite. A satellite can be natural, like Earth or the Moon.

  8. spaceplace.nasa.gov › search › meteorsMeteors | NASA Space Place – NASA Science for Kids

    Nov 8, 2024 · Asteroid or Meteor: What's the Difference? Learn more about asteroids, meteors, meteoroids, meteorites, and comets! explore; Mesosphere. The middle layer . explore; What Are Constellations? Learn more about what these groups of stars can (and can’t) tell us about our place in the universe. explore

  9. spaceplace.nasa.gov › impact-crater › enWhat Is an Impact Crater? - NASA Space Place

    Nov 7, 2024 · An impact crater is formed when an object like an asteroid or meteorite crashes into the surface of a larger solid object like a planet or a moon. To form a true impact crater, this object needs to be traveling extremely fast—many thousands of miles per hour!

  10. spaceplace.nasa.gov › review › postersDwarf Planets: Small Size, Big Mystery - NASA Space Place

    Dwarf planets can be found in the asteroid belt as far as 100 times Earth’s distance from the Sun. Most dwarf planets can also be classified as something else. The closest dwarf planet, Ceres, is also a large asteroid. Pluto is the most famous dwarf planet. As a tribute to this once-planet, all dwarf planets outside of Neptune’s

  11. spaceplace.nasa.gov › glossary › enGlossary | NASA Space Place – NASA Science for Kids

    Nov 8, 2024 · Asteroid: Rocks floating around in space. Some are the size of a pick-up truck. Others are hundreds of miles across. Atmosphere: The gases held by gravity around Earth and around other planets. "Atmosphere" can also be used to talk about gases around stars.