NGC 21 (Korean Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 21" in Korean language version.

Last modified: 03:30:20, 2 April 2026 (UTC)

Ref.Un. Ref.Website

Global rank Korean rank

240^th place

200^th place

caltech.edu (Global: 240^th place; Korean: 200^th place)

nedwww.ipac.caltech.edu

“NASA/IPAC Extragalactic Database”. 《Results for NGC 0021》. 2010년 5월 3일에 확인함.
“Distance Results for NGC 0021”. 《NASA/IPAC Extragalactic Database》. 2010년 5월 3일에 확인함.