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- Asteroid - Wikipedia
An asteroid is a minor planet —an object larger than a meteoroid that is neither a planet nor an identified comet —that orbits within the inner Solar System or is co-orbital with Jupiter (Trojan asteroids)
- Eyes on Asteroids - NASA JPL
Explore the 3D world of Asteroids, Comets and NEOs Learn about past and future missions, tracking and predicting orbits, and close approaches to Earth
- Asteroids - Science@NASA
Asteroids, sometimes called minor planets, are rocky, airless remnants left over from the early formation of our solar system about 4 6 billion years ago Most asteroids can be found orbiting the Sun between Mars and Jupiter within the main asteroid belt
- James Webb telescope ups the odds that city-killer asteroid 2024 YR4 . . .
The James Webb Space Telescope has taken another look at the potential "city-killer" asteroid 2024 YR4 and found its chances of hitting the moon in December 2032 have increased to 4 3%
- Asteroid on collision course with moon could fire shrapnel at Earth
The asteroid 2024 YR4, which was once thought to be on a collision course with Earth, may still pose a threat to the planet There is still a chance the space rock could smash into the moon, and
- What Is an Asteroid? | NASA Space Place – NASA Science for Kids
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 Image credit: NASA JPL-Caltech UCLA MPS DLR IDA There are lots of asteroids in our solar system
- Asteroid | Definition, Size, Facts | Britannica
Asteroid, any of a host of small bodies, about 1,000 km (600 miles) or less in diameter, that orbit the Sun primarily between the orbits of Mars and Jupiter in a nearly flat ring called the asteroid belt Hundreds of thousands of asteroids are known
- In Depth | Asteroids - NASA Solar System Exploration
Asteroids, sometimes called minor planets, are rocky remnants left over from the early formation of our solar system about 4 6 billion years ago The current known asteroid count is: Most of this ancient space rubble can be found orbiting our Sun between Mars and Jupiter within the main asteroid belt
- Asteroid Fast Facts - NASA
About once a year, an automobile-sized asteroid hits Earth’s atmosphere, creates an impressive fireball, and burns up before reaching the surface Every 2,000 years or so, a meteoroid the size of a football field hits Earth and causes significant damage to the area
- Asteroid: Definition, Size, Difference, Visibility, Facts
An asteroid is a small, rocky object that orbits the Sun, primarily found in the asteroid belt between Mars and Jupiter Asteroids range in size from tiny pebbles to massive bodies hundreds of kilometers across, with the largest, Ceres, measuring approximately 946 kilometers (588 miles) in diameter
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希伯來
希臘
條頓
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拉丁語
古英語
英格蘭
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拉丁;條頓
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