| 释义 |
Definition of asteroid in English: asteroidnoun ˈastərɔɪdˈæstəˌrɔɪd 1A 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. Example sentencesExamples - Both comets and asteroids are the left-over building blocks of the planets in our solar system.
- It's just that you can't keep quiet about things like asteroid impacts.
- Our star system is chock full of asteroids and comets, in every conceivable orbit and location.
- In our own solar system, asteroids have collided with Earth, the moon and other planets.
- You can also get asteroid hazard warnings and geomagnetic storm outlooks.
- We know very little about these families of asteroids following the same orbit.
- Once an asteroid drifts into either of those regions, it's hard for it to get out.
- Amateur astronomers have made many asteroid, comet, and supernova discoveries.
- Fragments of asteroids and comets pervade interplanetary space.
- There may be other families of small asteroids within our solar system that, even now, remain to be discovered.
- Most of the larger asteroids and comets are also in stable orbits around the sun.
- So to neglect the problem means that we are vulnerable to asteroid collisions.
- When the asteroid hit, it was vaporized by the extreme energy of the impact.
- Our knowledge of comets and asteroids has dramatically improved over the last 20 years.
- These scientists also study the natural satellites of other planets as well as asteroids and comets.
- Some explanations for extinctions and evolution include strikes by asteroids or comets.
- Ceres was initially considered to be a planet until other asteroids with similar orbits were found.
- Dinosaurs may not have been killed off by asteroid impact dust blocking out sunlight, a geologist says.
- It has been suggested that impacts with comets and asteroids provided Earth with much of its water.
- In many ways asteroids and comets are likely to offer more varied and abundant natural resources than the Moon.
- Most of the known asteroids orbit the sun in a belt between Mars and Jupiter.
- These glaciers are spotted with craters caused by asteroid impacts.
- Comets and asteroids also contribute to the near-Earth space environment.
Synonyms celestial body, heavenly body, sun 2Zoology
An echinoderm of the class Asteroidea, which comprises the starfishes. Example sentencesExamples - The fossil record is a potential source of needed data, although fossil asteroids are rare, and they tend to be poorly preserved.
- An unpaired commonly enlarged interbrachial ossicle, the axillary, occurs in most Paleozoic asteroids, including those treated here.
- Both approaches will shed light on the adaptive significance and functional morphology of asteroids.
- The asteroid is preserved with the dorsal surface exposed.
- Available morphological data suggest no ecologic parameters that would be unusual among living asteroids.
adjective ˈastərɔɪdˈæstəˌrɔɪd Zoology Relating to or denoting echinoderms of the class Asteroidea.
Origin Early 19th century: from Greek asteroeidēs 'starlike', from astēr 'star'. Definition of asteroid in US English: asteroidnounˈæstəˌrɔɪdˈastəˌroid 1A small rocky body orbiting the sun. Large numbers of these, ranging in size from nearly 600 miles (1,000 km) across (Ceres) to dust particles, are found (as the asteroid belt) especially between the orbits of Mars and Jupiter, though some have more eccentric orbits, and a few pass close to the earth or enter the atmosphere as meteors. Example sentencesExamples - Both comets and asteroids are the left-over building blocks of the planets in our solar system.
- It's just that you can't keep quiet about things like asteroid impacts.
- Comets and asteroids also contribute to the near-Earth space environment.
- Ceres was initially considered to be a planet until other asteroids with similar orbits were found.
- Fragments of asteroids and comets pervade interplanetary space.
- There may be other families of small asteroids within our solar system that, even now, remain to be discovered.
- In many ways asteroids and comets are likely to offer more varied and abundant natural resources than the Moon.
- Dinosaurs may not have been killed off by asteroid impact dust blocking out sunlight, a geologist says.
- When the asteroid hit, it was vaporized by the extreme energy of the impact.
- These scientists also study the natural satellites of other planets as well as asteroids and comets.
- So to neglect the problem means that we are vulnerable to asteroid collisions.
- These glaciers are spotted with craters caused by asteroid impacts.
- Most of the known asteroids orbit the sun in a belt between Mars and Jupiter.
- You can also get asteroid hazard warnings and geomagnetic storm outlooks.
- In our own solar system, asteroids have collided with Earth, the moon and other planets.
- Some explanations for extinctions and evolution include strikes by asteroids or comets.
- It has been suggested that impacts with comets and asteroids provided Earth with much of its water.
- Most of the larger asteroids and comets are also in stable orbits around the sun.
- Amateur astronomers have made many asteroid, comet, and supernova discoveries.
- We know very little about these families of asteroids following the same orbit.
- Our knowledge of comets and asteroids has dramatically improved over the last 20 years.
- Our star system is chock full of asteroids and comets, in every conceivable orbit and location.
- Once an asteroid drifts into either of those regions, it's hard for it to get out.
Synonyms celestial body, heavenly body, sun 2Zoology
An echinoderm of the class Asteroidea, which comprises the starfishes. Example sentencesExamples - Available morphological data suggest no ecologic parameters that would be unusual among living asteroids.
- Both approaches will shed light on the adaptive significance and functional morphology of asteroids.
- The fossil record is a potential source of needed data, although fossil asteroids are rare, and they tend to be poorly preserved.
- The asteroid is preserved with the dorsal surface exposed.
- An unpaired commonly enlarged interbrachial ossicle, the axillary, occurs in most Paleozoic asteroids, including those treated here.
adjectiveˈæstəˌrɔɪdˈastəˌroid Zoology Relating to or denoting echinoderms of the class Asteroidea.
Origin Early 19th century: from Greek asteroeidēs ‘starlike’, from astēr ‘star’. |