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SAGITTARIUS

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Sagittarius is one of the zodiac constellations. It is located in the Southern celestial hemisphere, so it is best visible from the Sourthern Hemisphere, but it can be also seen from some parts of the Northern Hemisphere during the summer months. Its name means "archer" in Latin, and it is commonly represented as a centaur drawing a bow. The center of our galaxy, the Milky Way lies in the western part of the constellation, therefore it is rich in deep-sky objects, such as emission, reflection and dust nebulae and star clusters.

The constellation appears in the mythologies of the ancient world as early as 4000 BC, on the dawn of the Egyptian and Mesopotamian cultures. Findings from this time period include a Mesopotamian border stone depicting the constellation as a half human half horse figure with a bow. This portayal was also present in the Greek and Roman star lore, where Sagittarius represented a half human, half goat being, named Krotos, whose father was the goat-legged Pan, the god of the wild, shepherds and rustic music. The constellation is also one of the 48 constellations listed by the 2nd-century astronomer, Ptolemy.
Sagittarius also had its own name in other mythologies, like the Chinese (Azure Dragon), Middle-Eastern (River, Returning ostrich) or the Native American (Swimming Duck in the pawnee culture). It was less significant in the European culture, as it barely rises above the horizon in many, especially northern parts of Europe.

Sagittarius
Chart created with Stellarium 0.18.2

Most notable stars and deep-sky objects


M22 (Great Sagittarius Cluster) binocular

M22 is a huge globular cluster consisting of hundreds of stars. It is one of the closest to the Earth, as it lies only 10.000 light years away. It can be easily spotted with binoculars, but it shows its true beauty when observed through a telescope.

M8 (The Lagoon Nebula) eyebinocularcamera

The Lagoon Nebula is an interstellar emission nebula, mainly consisting of hydrogen gas, where new stars and stellar systems are forming. Within the nebula there is also the open cluster NGC 6530. It is one of the only two star-forming nebulae faintly visible to the naked eye from under dark sky from the northern latitudes. Seen with binoculars, it appears as a distinct cloud-like patch. The nebula is between 4.000–6.000 light years away from the Earth.

M20 (Trifid Nebula) binocularcamera

This complex object, conisting of both emission and reflection nebulae, as well as interstellar dust and an open cluster of stars, was discovered by Charles Messier in 1764. The name refers to the nebula being divided into three parts by the dust nebula (the name meaning 'three-lobe'). It lies approx. 4.100 light years from Earth. When viewed through a binocular, or a small telescope, the Trifid Nebula is a bright and peculiar object, but it shows its beautiful colors on astrophotos and photographic observations.

M17 (Omega Nebula) binocularcamera

The Omega Nebula, also known as the Swan Nebula or the Horseshoe Nebula is a nebula mainly consisting of hydrogen-alpha, where new stars and stellar systems are forming. It is considered to be one of the brightest and most massive star-forming regions of our galaxy. It is between 5.000 and 6.000 light years from Earth and it spans some 15 light years in diameter. It can be clearly seen with binoculars, and it is a spectacular view when observed through larger telescopes. It is also a popular target among astrophotographers.


Legend:

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Visible with the naked eye
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Visible with binoculars
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Visible with telescope
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Popular target for astrophotography