Editing Winter Triangle (section)

{{Short description|Asterism}}
[[File:WinterSky.jpg|thumb|Winter stars with the Winter Triangle front and centre, forming a diamond (actually [[kite (geometry)|kite]]) or [[cross]] with [[Saturn]] above]]
The '''Winter Triangle''' is an astronomical [[asterism (astronomy)|asterism]] formed from three of the brightest stars in the winter sky. It is an imaginary [[isosceles triangle]]{{efn|Procyon-Sirius and Procyon-Betelgeuse are within 0.3° of one another but Sirius-Betelgeuse is significantly longer, so that the largest angle is 78.8°.}} drawn on the [[celestial sphere]], with its defining vertices at [[Sirius]], [[Betelgeuse]], and [[Procyon]], the primary stars in the three constellations of [[Canis Major (constellation)|Canis Major]], [[Orion (constellation)|Orion]], and [[Canis Minor]], respectively.<ref name=ridpath/>