Zodiac

Sagittarius

Sagittarius: its stars draw a teapot.

Best in August, around 9 p.m.No. 15 of the 88 constellations by areaBrightest star Kaus Australis (magnitude 1.85)8 stars in this guide
AlnaslKaus MediaKaus BorealisKaus AustralisAscellaNunkiAlbaldahPolis

The drawings on these maps are the game’s, and don’t show exact positions in the sky.

Find it in the sky

Its bright stars draw a teapot; just off its spout lies the centre of the Milky Way. Low in the south on summer evenings.

Legend

Sagittarius is drawn as a centaur or a satyr with his bow drawn. Eratosthenes held him to be Crotus, said to have invented archery, set in the sky at the Muses’ wish.

Sign

22 November to 21 December. In the real sky the Sun passes in front of Sagittarius from about 18 December to 18 January; it is there at the December solstice.

Its stars

Magnitude says how bright a star looks from here: the smaller the number, the brighter the star.

Alnasl

Gamma² Sagittarii

Type
Orange giant
Distance
about 97 light years
Brightness
magnitude 2.98
Name
“Arrowhead” (Arabic)

The arrowhead points toward the centre of the Milky Way, a few degrees away.

Kaus Media

Delta Sagittarii

Type
Orange giant
Distance
about 350 light years
Brightness
magnitude 2.70
Name
“Middle of the bow” (Arabic and Latin)

In the middle of the bow, an orange giant far bigger than the Sun.

Kaus Borealis

Lambda Sagittarii

Type
Orange giant
Distance
about 78 light years
Brightness
magnitude 2.81
Name
“North of the bow” (Arabic and Latin)

So close to the Sun’s path that the Moon often, and planets sometimes, pass in front.

Kaus Australis

Epsilon Sagittarii

Type
Blue-white giant
Distance
about 143 light years
Brightness
magnitude 1.85
Name
“South of the bow” (Arabic and Latin)

Sagittarius’s brightest star and a corner of the Teapot.

Ascella

Zeta Sagittarii

Type
White giant
Distance
about 88 light years
Brightness
magnitude 2.60
Name
“Armpit” (Latin)

A pair of stars that circle each other every 21 years.

Nunki

Sigma Sagittarii

Type
Blue-white star
Distance
about 228 light years
Brightness
magnitude 2.05
Name
The Babylonian name of the holy city of Eridu

One of the oldest star names known. Near the Sun’s path, the Moon can hide it.

Albaldah

Pi Sagittarii

Type
Yellow-white bright giant
Distance
about 510 light years
Brightness
magnitude 2.89
Name
“The town” (Arabic)

A triple system led by a bright giant much larger than the Sun.

Polis

Mu Sagittarii

Type
Blue supergiant
Distance
about 5,000 light years
Brightness
magnitude 3.84
Name
“City” (Greek)

A supergiant about 180,000 times brighter than the Sun; it will end as a supernova.

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Sources: constellation areas follow the International Astronomical Union (IAU) boundaries; star values come from Wikipedia’s articles, based on Hipparcos and Gaia; the Sun’s dates come from EarthSky. Distances are rounded.