NGC 6990 (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 6990" in Polish language version.

Last modified: 01:13:00, 4 January 2026 (UTC)

Ref.Un. Ref.Website

Global rank Polish rank

240^th place

826^th place

11cseligman.com

1,720^th place

239^th place

caltech.edu (Global: 240^th place; Polish: 826^th place)

ned.ipac.caltech.edu

NGC 6990 w NASA/IPAC Extragalactic Database (ang.)

cseligman.com (Global: 1,720^th place; Polish: 239^th place)

Courtney Seligman: NGC 6990. Celestial Atlas. [dostęp 2015-11-22]. (ang.).