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IAU designated constellations in equirectangular projection (epoch B1875.0) In contemporary astronomy, 88 constellations are recognized by the International Astronomical Union (IAU). [1] Each constellation is a region of the sky bordered by arcs of right ascension and declination, together covering the entire celestial sphere. Their boundaries ...
Hydra is the largest constellation, covering more than 1 ⁄ 32 of the night sky and 19 times the area of Crux, the smallest constellation. The International Astronomical Union (IAU) designates 88 constellations of stars.
The International Astronomical Union (IAU) designates 88 constellations. [1] In the table below, they are listed by geographical visibility according to latitude as seen from Earth, as well as the best months for viewing the constellations at 21:00 (9 p.m.).
IAU designated constellations by area; IAU designated constellations by geographical visibility This page was last edited on 1 April 2020, at 02:19 (UTC). Text is ...
Chinese constellations – traditional Chinese astronomy constellations; List of Nakshatras – sectors along the Moon's ecliptic; IAU designated constellations by area – a list of constellations ranked by area; IAU designated constellations by geographical visibility – a list of constellations listed by the latitudes from which they can be ...
Examples include Alpha Andromedae (α And) in the constellation of Andromeda, Alpha Centauri (α Cen), in the constellation Centaurus, Alpha Crucis (α Cru) and Beta Crucis (β Cru), the two brightest stars in the constellation Crux, the Southern Cross, Epsilon Carinae (ε Car) in Carina, Lambda Scorpii (λ Sco) in Scorpius and Sigma Sagittarii ...
We are lacking what Ptolemy did, that the Southern celestial hemisphere is not observable from Europe, so these constellations were defined much later than the others. Then you could mention some of the most influential people like Lacaille, and mention what Delporte did and what the IAU did in 1922 and 1928.
Covering 179 square degrees and hence 0.433% of the sky, Corona Borealis ranks 73rd of the IAU designated constellations by area. [5] Its position in the Northern Celestial Hemisphere means that the whole constellation is visible to observers north of 50°S.
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