NGC 21 (Swedish Wikipedia)

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

refsWebsite

Global rank Swedish rank

887^th place

1,794^th place

1in-the-sky.org

low place

low place

caltech.edu (Global: 887^th place; Swedish: 1,794^th place)

nedipac.caltech.edu

”NASA/IPAC Extragalactic Database”. Results for NGC 0021. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+21&img_stamp=yes&extend=no. Läst 3 maj 2010.
”Distance Results for NGC 0021”. NASA/IPAC Extragalactic Database. http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+0021. Läst 3 maj 2010.

in-the-sky.org (Global: low place; Swedish: low place)

”The galaxy NGC 21”. https://in-the-sky.org/data/object.php?id=NGC21.