description NGC 6537 (Red Spider) Overview
NGC 6537, commonly called the Red Spider Nebula, is a bipolar planetary nebula in the constellation Sagittarius. Its nickname refers to the two-lobed structure and dark divisions that give the nebula a spider-like appearance in images. The visible material consists of ionized gas expelled by a dying star, with shocks and complex flows shaping the bright filaments and surrounding shell.
help NGC 6537 (Red Spider) FAQ
What is the Red Spider Nebula?
NGC 6537 is a bipolar planetary nebula in Sagittarius, formed from gas expelled by a dying star. Its two-lobed structure and bright central region create the spider-like appearance behind the nickname.
Why does NGC 6537 have such strong shockwaves?
A very hot central stellar remnant drives fast winds into slower material that the star expelled earlier. Astronomical studies describe shock speeds on the order of 100 kilometers per second in parts of the nebula.
Is the Red Spider Nebula the remains of a supernova?
No, NGC 6537 is a planetary nebula rather than a supernova remnant. It represents the outer layers of a lower or intermediate-mass star being expelled around a hot white-dwarf remnant.
Where is NGC 6537 located?
It lies in the constellation Sagittarius toward the central regions of the Milky Way. Distance estimates vary substantially, so a broad range of several thousand light-years is safer than treating one exact figure as settled.
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