What Is an Asteroid? | NASA Space Place – NASA Science for Kids
2024年11月8日 · Asteroids are small, rocky objects that orbit the sun. Although asteroids orbit the sun like planets, they are much smaller than planets. A close-up image of the asteroid Ida taken by NASA's Galileo spacecraft.
Asteroid or Meteor: What's the Difference? - NASA Space Place
2024年11月8日 · 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! Asteroids
What Is a Comet? | NASA Space Place – NASA Science for Kids
2024年11月8日 · Where do comets come from? Comets are mostly found way out in the solar system. Some exist in a wide disk beyond the orbit of Neptune called the Kuiper Belt.We call these short-period comets.They take less than 200 years to orbit the Sun.
What Is a Satellite? | NASA Space Place – NASA Science for Kids
2024年11月8日 · Others explore asteroids and comets, the history of stars, and the origin of planets. Some satellites fly near or orbit other planets. These spacecraft may look for evidence of water on Mars or capture close-up pictures of Saturn's rings. Build a NASA spacecraft at home!
Why does Saturn have rings? - NASA Space Place
2024年11月8日 · An image of Saturn taken by the Cassini spacecraft. Credit: NASA/JPL-Caltech/Space Science Institute. Scientists have ideas about why Saturn has rings, but no one knows for sure.
Asteroid | NASA Space Place – NASA Science for Kids
2024年11月8日 · 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; Why Does the Moon Have Craters?
Solar System | NASA Space Place – NASA Science for Kids
2024年11月8日 · 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; Make a Planet Mask! Make a mask and pretend to be your favorite planet in our solar system! do; The Mars Rovers: Perseverance
Meteors | NASA Space Place – NASA Science for Kids
2024年11月8日 · 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
Sunspots and Solar Flares | NASA Space Place – NASA Science for …
2024年11月8日 · Sunspots are areas that appear dark on the surface of the Sun. They appear dark because they are cooler than other parts of the Sun’s surface. Solar flares are a sudden explosion of energy caused by tangling, crossing or reorganizing of …
Why Does the Moon Have Craters? - NASA Space Place
2020年4月23日 · An asteroid or meteor is more likely to hit Earth because Earth is a lot bigger than the Moon, giving a meteoroid more area to hit! But we can see many thousands of craters on the Moon and we only know of about 180 on Earth!