What is Angular size?
'''Angular size''' is a [[measurement]] of how large or small something is using rotational measurement. It is useful for measuring things that are so far away that they appear [[2D|two dimensional]]. ==Other websites== *[http://ceres.hsc.edu/homepages/classes/astronomy/fall97/Mathematics/sec9.html Small-Angle Formula] {{Webarchive|url=https://web.archive.org/web/19971007100829/http://ceres.hsc.edu/homepages/classes/astronomy/fall97/Mathematics/sec9.html |date=1997-10-07 }} *[http://www.astronomynotes.com/solarsys/s2.htm Visual Aid to the Apparent Size of the Planets] {{Math-stub}} [[Category:Measurement]]