User:Ashill/sandbox

First page of Duckduckgo hits (excluding Wikipedia!):


 * Britannica: "AU or au" in initial definition, but uses AU.
 * EartySky: AU only
 * IPAC Cool Cosmos: AU only
 * NASA CNEOS: "The IAU has specified that this term is lower-case “au”, so “AU” is techincally incorrect."
 * Free Dictionary: AU in 5 of the 6 entries listed; au in the 6th.
 * http www.unit-conversion. info/astronomical.html unit-conversion.com: AU
 * Infoboom.com: AU
 * Calculateme.com: AU

Scientific American August 27 2020 article: AU

Wolfram Alpha: au

Textbooks off my shelf (general undergrad, astrophysics undergrad, graduate, most recent publication date 2020): all AU

Journals:
 * ApJ (checked four articles from current edition; assuming other AAS journals are similar): all au (that is a change from a few years ago)
 * MNRAS: assuming au as they were a couple years ago (haven't re-checked)
 * Journal of Geophysical Research: au
 * Nature Astronomy: mostly au; at least one AU