Proper motion (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Proper motion" in Simple English language version.

Last modified: 20:25:41, 23 November 2025 (UTC)

Ref.Un. Ref.Website

Global rank Simple English rank

11books.google.com

3^rd place

4^th place

books.google.com (Global: 3^rd place; Simple English: 4^th place)

Theo Koupelis, Karl F. Kuhn (2007). In Quest of the Universe. Jones & Bartlett Publishers. p. 369. ISBN 978-0763743871.