Korona

Korona henviser til flere artikler:
- Korona (månen) – en lysende skive omkring månen hvor månen oplyser tynde skyer "bagfra". Modsat en halo, der skyldes at månens lys brydes i iskrystallerne
- Korona (solen) – en betegnelsen for solens yderste lag, som kun kan ses ved totale solformørkelser. Koronaen har en temperatur på op til 1,5 mio. grader, men en meget lav stoftæthed

Se også

- Corona

Halo

En halo er en lysende farvet ring omkring et himmellegeme. En halo kan opstå når solen eller månen lyser gennem et tyndt skylag som består af små iskrystaller. Haloer forekommer ofte sammen med bisole da de to fænomener har en del tilfælles.

Se også

- Bisol

Kilder/henvisninger

- Lexopen

Eksterne henvisninger

- Oplysninger i bogen [http://www.astro.ku.dk/lys/ Lysfænomener i Naturen] (afsnittet [http://www.astro.ku.dk/lys/halo.html Haloer og glorier]).
- [http://www.sundog.clara.co.uk/halo/parhelia.htm Sundogs (parhelia)]
- [http://news.bbc.co.uk/1/hi/sci/tech/279883.stm February 15, 1999, BBC News: Haloes hang over South Pole] Citat: "...Scientists at the South Pole research base were dazzled recently by one of nature's most enchanting sights - sky haloes..." (med billeder)
- Artikel om emnet i [http://www.dr.dk/nyheder/vejret/brevkasse/article.jhtml?articleID=170324 DR's brevkasse] ja:暈 ko:무리

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