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

One half of Iapetus is dark as coal while the other is bright as snow. The figure is taken from ESA, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Yes. It sits on the Space shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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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

Saturn moon Iapetus features two contrasting colour hemispheres

One half of Iapetus is dark as coal while the other is bright as snow

Iapetus displays a striking two-tone appearance, with one trailing hemisphere covered in bright water ice and its leading hemisphere coated in dark carbonaceous material. Thermal dust migration exaggerates this contrast as dark areas absorb sunlight, heat up, and sublimate ice to brighter regions.

Iapetus mountains Larger — NASA/JPL/Space Science Institute · Public domain · source

Where this comes from

ESA

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Tags: iapetus, saturn, contrast

Saturn moon Iapetus features two contrasting colour hemispheres: the short answers

Where does this come from, and can I check it?: One half of Iapetus is dark as coal while the other is bright as snow. The figure is taken from ESA, 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 1,090 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.