The Spring Triangle with Arcturus, Spica, Regulus, and Denebola
The Spring Triangle is an astronomical asterism involving an imaginary triangle drawn upon the celestial sphere, with its defining vertices at Arcturus, Spica, and Regulus.[1] This triangle connects the constellations of Boötes, Virgo, and Leo. It is visible in the evening rising in the southeastern sky of the Northern Hemisphere between March and May and setting until August, while at morning rising and setting from November to the end of February.
George Lovi of Sky & Telescope magazine had a slightly different Spring Triangle, including the tail of Leo, with Denebola replacing Regulus. Although Denebola is dimmer, this triangle is more nearly equilateral.[2]
These stars, together with Cor Caroli, form parts of a larger spring asterism called the Great Diamond.
The SpringTriangle is an astronomical asterism involving an imaginary triangle drawn upon the celestial sphere, with its defining vertices at Arcturus...
luminous stars in the entire galaxy. Northern Cross Spring Great Diamond SpringTriangle Winter Triangle Winter Hexagon Heavenly Market enclosure Patrick...
The Triangle Shirtwaist Factory fire in the Greenwich Village neighborhood of Manhattan, New York City, on Saturday, March 25, 1911, was the deadliest...
which is Latinized to Alpha Boötis. Arcturus forms one corner of the SpringTriangle asterism. Located relatively close at 36.7 light-years from the Sun...
In geometry, an isosceles triangle (/aɪˈsɒsəliːz/) is a triangle that has two sides of equal length. Sometimes it is specified as having exactly two sides...
Arcturus and Denebola—or Regulus, depending on the source—forms the SpringTriangle asterism, and, by extension, is also part of the Great Diamond together...
In mathematics, the triangle inequality states that for any triangle, the sum of the lengths of any two sides must be greater than or equal to the length...
The Research Triangle, or simply The Triangle, are both common nicknames for a metropolitan area in the Piedmont region of the U.S. state of North Carolina...
southernmost stars are sometimes regarded as being their own asterism, the SpringTriangle. Lying within the Great Diamond is the set of stars traditionally assigned...
equilateral triangle is a triangle in which all three sides have the same length. In the familiar Euclidean geometry, an equilateral triangle is also equiangular;...
The Penrose triangle, also known as the Penrose tribar, the impossible tribar, or the impossible triangle, is a triangular impossible object, an optical...
Winter Triangle is high in the sky at mid-northern latitudes, but can also be seen during autumn in the early morning to the East. In the spring the winter...
A set square or triangle (American English) is an object used in engineering and technical drawing, with the aim of providing a straightedge at a right...
The Princeton Triangle Club is a theater troupe at Princeton University. Founded in 1891, it is one of the oldest collegiate theater troupes in the United...
A Reuleaux triangle [ʁœlo] is a curved triangle with constant width, the simplest and best known curve of constant width other than the circle. It is formed...
An integer triangle or integral triangle is a triangle all of whose side lengths are integers. A rational triangle is one whose side lengths are rational...
The purple triangle was a concentration camp badge used by the Nazis to identify Jehovah's Witnesses in Nazi Germany. The purple triangle was introduced...
reddish one). Denebola, along with Spica and Arcturus, is part of the SpringTriangle asterism, and by extension, also of the Great Diamond together with...
(trígōnon) 'triangle', and μέτρον (métron) 'measure') is a branch of mathematics concerned with relationships between angles and side lengths of triangles. In...
In geometry, a triangle center or triangle centre is a point in the triangle's plane that is in some sense in the middle of the triangle. For example,...
incircle is a triangle center called the triangle's incenter. An excircle or escribed circle of the triangle is a circle lying outside the triangle, tangent...
the sum of angles of a triangle equals a straight angle (180 degrees, π radians, two right angles, or a half-turn). A triangle has three angles, one at...
In hyperbolic geometry, a hyperbolic triangle is a triangle in the hyperbolic plane. It consists of three line segments called sides or edges and three...
The Coral Triangle (CT) is a roughly triangular area in the tropical waters around the Philippines, Indonesia, Malaysia, Papua New Guinea, the Solomon...
Providence or All-Seeing Eye is a symbol depicting an eye, often enclosed in a triangle and surrounded by a ray of light or a halo, intended to represent Providence...
Global Information