“meteoroid”的概念、定义、翻译、参考文献-科学参考

meteoroid

Astronomy

A small particle from a comet or asteroid in orbit around the Sun. While the distinction between a large meteoroid and a small asteroid may be somewhat blurred, the term meteoroid most commonly refers to a particle which gives rise to a meteor on entering Earth’s atmosphere. Typical meteoroids in a meteor stream, such as that which produces the Perseid meteor shower, are a few millimetres in diameter, and have low densities (0.2–0.3 g/cm³). Meteoroids in the Geminid stream, whose parent body is the asteroid Phaethon, have a higher density, 2 g/cm³.

Space Exploration

A small natural object in interplanetary space. Meteoroids are smaller than asteroids, ranging from the size of a pebble up, and move through space at high speeds. There is no official distinction between meteoroids and asteroids, although the term ‘asteroid’ is generally reserved for objects larger than 1.6 km in diameter.
Meteoroids are believed to result from the fragmentation of asteroids after collisions. Some meteoroids strike the Earth's atmosphere, and their fiery trails are called meteors. If they fall to Earth, they are named meteorites.
A meteoroid could puncture a spacecraft or spacesuit. The Skylab space station carried a meteoroid shield, and a protective layer of felt was added to the spacesuits of astronauts on the Gemini project.

Geology and Earth Sciences

Small, extraterrestrial body, within the solar system, that may enter the Earth’s atmosphere if its orbit around the Sun crosses that of the Earth. Strictly, at the point where a meteoroid enters the atmosphere it is referred to as a meteor; if it reaches the Earth’s surface it is known as a meteorite.

单词	meteoroid
释义	meteoroid Astronomy A small particle from a comet or asteroid in orbit around the Sun. While the distinction between a large meteoroid and a small asteroid may be somewhat blurred, the term meteoroid most commonly refers to a particle which gives rise to a meteor on entering Earth’s atmosphere. Typical meteoroids in a meteor stream, such as that which produces the Perseid meteor shower, are a few millimetres in diameter, and have low densities (0.2–0.3 g/cm³). Meteoroids in the Geminid stream, whose parent body is the asteroid Phaethon, have a higher density, 2 g/cm³. Space Exploration A small natural object in interplanetary space. Meteoroids are smaller than asteroids, ranging from the size of a pebble up, and move through space at high speeds. There is no official distinction between meteoroids and asteroids, although the term ‘asteroid’ is generally reserved for objects larger than 1.6 km in diameter. Meteoroids are believed to result from the fragmentation of asteroids after collisions. Some meteoroids strike the Earth's atmosphere, and their fiery trails are called meteors. If they fall to Earth, they are named meteorites. A meteoroid could puncture a spacecraft or spacesuit. The Skylab space station carried a meteoroid shield, and a protective layer of felt was added to the spacesuits of astronauts on the Gemini project. Geology and Earth Sciences Small, extraterrestrial body, within the solar system, that may enter the Earth’s atmosphere if its orbit around the Sun crosses that of the Earth. Strictly, at the point where a meteoroid enters the atmosphere it is referred to as a meteor; if it reaches the Earth’s surface it is known as a meteorite.
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