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NGC 6445 (Box Nebula)

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description NGC 6445 (Box Nebula) Overview

NGC 6445, known as the Box Nebula, is a planetary nebula in the constellation Sagittarius. Its visible gas forms an angular, roughly rectangular outline rather than a simple circular shell, and detailed observations show multiple interacting lobes and structures. William Herschel discovered it in 1786. The nebula consists of material expelled by a dying star and illuminated by the hot stellar core that remains at its center.

help NGC 6445 (Box Nebula) FAQ

What is NGC 6445, and why is it called the Box Nebula?

NGC 6445 is a planetary nebula in Sagittarius with a striking rectangular outline. Its box-like appearance gives it the common name Box Nebula.

When was the Box Nebula discovered?

NGC 6445 was discovered in 1786. Its unusual shape later made it a popular object for observers studying complex planetary-nebula structures.

Why does NGC 6445 have such a rectangular shape?

The nebula has a complex multi-polar structure rather than a simple spherical shell. Several interacting outflow directions can produce the box-like appearance seen in images.

Is NGC 6445 a galaxy or a planetary nebula?

It is a planetary nebula, meaning it is the glowing material expelled by a dying star around a hot central remnant. The name does not refer to a planet and the object is located in the Milky Way's Sagittarius region.

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