What is the approximate diameter limit distinguishing a Meteoroid from an Asteroid?
Answer
About one meter
The distinction between a meteoroid and an asteroid is primarily based on size, although both are objects orbiting the Sun composed of rock or metal fragments. Definitions generally place the upper size limit for classifying an object as a meteoroid at approximately one meter in diameter. Any cosmic object exceeding this one-meter threshold is usually classified instead as an asteroid. Conversely, the lower boundary for meteoroids extends down to incredibly small sizes, encompassing particles as minute as grains of sand drifting in space.
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