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Sagittarius

Sagittarius is a constellation in the southern sky that lies in the direction of the center of the Milky Way galaxy. It is rich in deep-sky objects and is home to Sagittarius A*, the supermassive black hole at the Milky Way’s core.

Source: nasa.gov

APODs including "Sagittarius"

The Lagoon Nebula in Stars Dust and Gas

24/09/2014

The Lagoon Nebula in Stars Dust and Gas
Image Credit: Remus Chua (Celestial Portraits) / NASA APOD

The large majestic Lagoon Nebula is home for many young stars and hot gas. Spanning 100 light years across while lying only about 5000 light years distant, the Lagoon Nebula is so big and bright that it can be seen without a telescope toward the constellation of Sagittarius. Many bright stars are visible from NGC 6530, an open cluster that formed in the nebula only several million years ago. The greater nebula, also known as M8 and NGC 6523, is named "Lagoon" for the band of dust seen to the left of the open cluster's center. A bright knot of gas and dust in the nebula's center is known as the Hourglass Nebula. The featured picture is a newly processed panorama of M8, capturing five times the diameter of the Moon. Star formation continues in the Lagoon Nebula as witnessed by the many globules that exist there. APOD Wall Calendar: Nebulas and Star Clusters