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The three interior angles of the celestial triangle. The figure to the right represents the three angular distances. The left one represents the angle at the observed pointing between the zenith direction and the solar direction. This is thus heavily dependent on the changing solar direction as the Sun is perceived as moving across the sky.
Deneb is one of the vertices of the asterism known as the Summer Triangle and the "head" of the Northern Cross. It is the brightest star in Cygnus and the 19th brightest star in the night sky, with an average apparent magnitude of +1.25. Deneb rivals Rigel, a closer blue supergiant, as the most luminous first-magnitude star.
Triangulum is a small constellation in the northern sky. Its name is Latin for "triangle", derived from its three brightest stars, which form a long and narrow triangle.Known to the ancient Babylonians and Greeks, Triangulum was one of the 48 constellations listed by the 2nd century astronomer Ptolemy.
In 210,000 years, Vega will become the brightest star in the night sky, [35] and will peak in brightness in 290,000 years with an apparent magnitude of –0.81. [35] This star lies at a vertex of a widely spaced asterism called the Summer Triangle, which consists of Vega plus the two first-magnitude stars Altair, in Aquila, and Deneb in Cygnus ...
Other colours in the sky, such as glowing skies at dusk and dawn. These are from additional particulate matter in the sky that scatter different colors at different angles. Halos, afterglows, coronas, polar stratospheric clouds, and sun dogs. These are from scattering, or refraction, by ice crystals and from other particles in the atmosphere ...
A right triangle ABC with its right angle at C, hypotenuse c, and legs a and b,. A right triangle or right-angled triangle, sometimes called an orthogonal triangle or rectangular triangle, is a triangle in which two sides are perpendicular, forming a right angle (1 ⁄ 4 turn or 90 degrees).
For example, a right triangle may have angles that form simple relationships, such as 45°–45°–90°. This is called an "angle-based" right triangle. A "side-based" right triangle is one in which the lengths of the sides form ratios of whole numbers, such as 3 : 4 : 5, or of other special numbers such as the golden ratio.
This is an accepted version of this page This is the latest accepted revision, reviewed on 29 December 2024. Color "Sky (color)" redirects here. For other uses, see Sky Blue (disambiguation). Sky blue Common connotations boys, daylight, water, air, paleness Colour coordinates Hex triplet #87CEEB sRGB B (r, g, b) (135, 206, 235) HSV (h, s, v) (197°, 43%, 92%) CIELCh uv (L, C, h) (79, 46, 223 ...