Blwyddyn golau: Gwahaniaeth rhwng fersiynau

Cynnwys wedi'i ddileu Cynnwys wedi'i ychwanegu
Dim crynodeb golygu
Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.8
Llinell 40:
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|15.8 e-6 ly
|Un [[uned seryddol]] (AU) (y pellter o'r [[Haul]] i'r [[Ddaear]]). Mae'n cymryd tua 8.31 munud i olau deithio'r pellter hwn.<ref>Prifysgol Gorllewin Ontario [http://pcl.physics.uwo.ca/SunEarth/index.html ''The Sun-Earth Connection''] {{Webarchive|url=https://web.archive.org/web/20061002103318/http://pcl.physics.uwo.ca/SunEarth/index.html |date=2006-10-02 }}</ref>
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|10<sup>−3</sup>