Where does this come from, and can I check it?

With no wind or water to round them, soil grains keep jagged edges. The figure is taken from USGS Astrogeology Science Center, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a space fact?

Yes. It sits on the Space shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Lunar dust is sharp enough to scratch glass

With no wind or water to round them, soil grains keep jagged edges The lunar surface is covered in regolith, a blanket of broken rock and glassy fragments a few metres deep in places. Micrometeorite strikes melt and shatter grains without ever smoothing them, so the particles are abrasive and cling to suits and optics. Apollo crews found dust wore through outer layers and irritated eyes and lungs. It sits in Mondo's space collection, one of 200 facts that each trace back to the reference below.

Where this comes from

USGS Astrogeology Science Center

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Space & Astronomy trivia Science trivia

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Tags: moon, regolith, dust

Lunar dust is sharp enough to scratch glass: the short answers

Where does this come from, and can I check it?: With no wind or water to round them, soil grains keep jagged edges. The figure is taken from USGS Astrogeology Science Center, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.