Kern arc

Kern arc bụ ihe na-adịghị ahụkebe nke ikuku nké sitere na ezinụlọ nke ice crystal halos. Ọ bụ okirikiri zuru okè na nke na-adịghị ike gburu-gburu zenith, n'adịghị ka okirikiri okirikiri na-emetụta yá nà nkè a na-ahụkarị, nké bụ naanị okirikiri.

A na-akpọ oghere Kern aha H.F.A. Kern na Netherlands, ónyé mbụ kọrọ ya na ụbọchị asatọ n'ọnwa Ọktoba, 1895.S. W. Visser: Optische verschijnselen aan de hemel, bladzijde 58, § 44: De gespiegelde circumzenitale boog. Boog van Kern  Kemgbe ahụ, a kọọrọ ya ugboro isii.
A na-emepụta ya site na ụzarị na-abanye n'elu ihu nkè kristal dị larịị ma na-apụ site na ihu dị nso. Igwe ụzarị ụzarị na-enwe n'ime n'akụkụ ihu na-agbadata na 60 ° na ihu ọpụpụ. N'akụkụ triangular hexagonal crystals nwèrè ihu atọ dị mkpụmkpụ karịa ndị ọzọ na-enye ohere ka oghere Kern mee.

Foto mbụ nke oghere Kern bụ nke Marko Mikkilä sere na nso Vuokatti Ski Resort, Sotkamo, Finland n'ubochi irí na asaa n'ọnwa Nọvemba 2007. Foto ndị ahụ dị n'ìhè anyanwụ sitere n'ikuku mmiri nke ice crystals nke snowguns mepụtara.Mikkilä, Marko (2008-01-27). . ursa.fi. URSA. Archived from the original on 2008-02-07. Retrieved 2008-01-30. (Mikkilä's description of the observation.) Na Vuokatti Ski Resort ihe dị ka otu narị snowguns nwere ike ịrụ ọrụ n'otu ógè. Okpomọkụ bụ -15 ruo -18 °C na mbara igwe doro ányá na ọ fọrọ nke nta ka ọ bụrụ na ikuku adịghị. A na-eji igwefoto Nikon D70 na Nikon FM na Sigma 8mm EX F4, Sigma 15mm EX F2.8 anya. A chịkọtakwara ụfọdụ ihe nlele nke ice crystals, na-akwado ihe fọrọ nke nta ka ọ bụrụ ntọala triangular ha.

E bipụtara foto Mikkilä na mbụ na Tähdet ja avaruus-magazine 1/2008. Ọ bụ URSA, òtù Finnish nkè nkà mmụta mbárá igwe, bipụtara magazin ahụ.

 Hụkwa 

 Halo (ihe ọhụụ)
 Okpokoro gburugburu

 Edensibia