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2. IAU designated constellations by area - Wikipedia

   en.wikipedia.org/wiki/IAU_designated...

   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.

3. Hydra (constellation) - Wikipedia

   en.wikipedia.org/wiki/Hydra_(constellation)

   The Greek constellation of Hydra is an adaptation of a Babylonian constellation: the MUL.APIN includes a "serpent" constellation (MUL.DINGIR.MUŠ) that loosely corresponds to Hydra. It is one of two Babylonian "serpent" constellations (the other being the origin of the Greek Serpens), a mythological hybrid of serpent, lion and bird. [2]

4. IAU designated constellations by geographical visibility

   en.wikipedia.org/wiki/IAU_designated...

   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.).

5. List of largest stars - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_stars

   Below are lists of the largest stars currently known, ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately 695,700 km; 432,300 mi). [1] The Sun, the orbit of Earth, Jupiter, and Neptune, compared to four stars (Pistol Star, Rho Cassiopeiae, Betelgeuse, and VY Canis Majoris)

6. Andromeda (constellation) - Wikipedia

   en.wikipedia.org/wiki/Andromeda_(constellation)

   This is over 1,400 times the size of the full moon, 55% of the size of the largest constellation, Hydra, and over 10 times the size of the smallest constellation, Crux. Its brightest star, Alpheratz (Alpha Andromedae), is a binary star that has also been counted as a part of Pegasus , while Gamma Andromedae (Almach) is a colorful binary and a ...

7. IAU designated constellations - Wikipedia

   en.wikipedia.org/wiki/IAU_designated_constellations

   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 ...

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9. Virgo (constellation) - Wikipedia

   en.wikipedia.org/wiki/Virgo_(constellation)

   The constellation Virgo. Virgo is prominent in the spring sky in the Northern Hemisphere, visible all night in March and April. As the largest zodiac constellation, the Sun takes 44 days to pass through it, longer than any other. From 1990 and until 2062, this will take place from September 16 to October 30.