What is the general size range spanning interplanetary dust particles referred to as micrometeoroids?
Answer
From the scale of a few micrometers up to about a millimeter
Interplanetary dust encompasses a wide spectrum of particle sizes, although the range considered for what are often called micrometeoroids or space dust is quite specific and generally falls within the sub-millimeter scale. These particles, which are remnants from early solar system formation or erosion, typically span from the very small scale of a few micrometers—a unit of measurement where one micrometer is one-millionth of a meter—up to approximately one millimeter. This range clearly distinguishes them from the much smaller atomic nuclei found in solar ejecta and the vastly larger asteroid fragments.
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