Planum Boreum (Norwegian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Planum Boreum" in Norwegian language version.

refsWebsite

Global rank Norwegian rank

167^th place

190^th place

1hubblesite.org

6,632^nd place

3,061^st place

hubblesite.org

«Colossal Cyclone Swirls near Martian North Pole». Besøkt 1. november 2006.

usgs.gov

planetarynames.wr.usgs.gov

[1] og [2] angir at Vastitas Borealis begynner ved 54.7°N og Planum Boreum ved 78.5°N. Radiusen til Mars er omtrentlig 3 400 km, så $d={\frac {78.5-54.7}{360}}\times 2\pi \ \times 3400{\mbox{ km}}=1412{\mbox{ km}}$