사용자:Ta183ta/연습장: 두 판 사이의 차이

 

[[File:Redgiants.svg|thumb|upright=1.0|right|적색초거성 안타레스와 주계열성 태양(우상단 점)을 비교한 그림. 중간 크기 별은 오렌지색 거성 아크투루스.]]

 

The diameter of Antares can be measured most accurately using [[interferometry]] or observing [[Occultation|lunar occultation]]s events. An apparent diameter from occultations 41.3 ± 0.1 [[Minute and second of arc#Symbols and abbreviations|milliarcseconds]] has been published.<ref name="richichi" /> Interferometry allows synthesis of a view of the stellar disc, which is then represented as a [[Limb darkening|limb-darkened]] disk surrounded by an extended atmosphere. The diameter of the limb-darkened disk was measured as {{val|37.38|0.06|u=milliarcseconds}} in 2009 and {{val|37.31|0.09|u=milliarcseconds}} in 2010. The linear radius of the star can be calculated from its angular diameter and distance. However, the distance to Antares is not known with the same accuracy as modern measurements of its diameter.