Talk:Carbon monoxide

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Trillion

Latest comment: 1 year ago1 comment1 person in discussion

@Dirac66: MOS:TRILLION says that on English Wikipedia, "trillion" is understood to mean the short scale value of 10¹². It can be used without needing to translate it into digits. Billion also has two meanings, and this article uses that term in the commonly understood short scale sense, without translation into digits. -- Beland (talk) 16:31, 12 June 2025 (UTC)Reply

H2 lines are not in the ultraviolet

Latest comment: 4 months ago1 comment1 person in discussion

I think either a clarification or a complete rewrite of the phrase "as molecular hydrogen can only be detected using ultraviolet light," is needed.

Molecular hydrogen in the ISM is not typically tracked through the use of UV astronomy, but through radio observations of the 21 cm line. (It's true that these emissions are much fainter than CO emissions per molecule, but the vastly greater amount of H2 in giant molecular clouds helps to compensate.) Whomever wrote this initially most have mixed it up with atomic hydrogen. ~2026-10290-85 (talk) 00:50, 15 February 2026 (UTC)Reply

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