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NGC 3242 (also known as the Ghost of Jupiter, Eye Nebula or Caldwell 59) is a planetary nebula located in the constellation Hydra.. William Herschel discovered the nebula on February 7, 1785, and catalogued it as H IV.27.
NGC 2818 is a planetary nebula located in the southern constellation Pyxis (The Compass). It consists largely of glowing gases from the star's outer layers ejected during the final stages of its life when it had run out of the fuel necessary to sustain its core fusion processes.
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The nebula has been studied at radio and x-ray wavelengths, but it is still unclear whether it was produced at the class O main sequence stage of development, as a red supergiant, luminous blue variable, or mainly as a Wolf-Rayet star. [2] NGC 2361 is a bright knot of nebulosity on one edge of the central ring of NGC 2359.
NGC 3918 is a bright planetary nebula in the constellation Centaurus, nicknamed the "Blue Planetary" or "The Southerner". It is the brightest of the far southern planetary nebulae. This nebula was discovered by Sir John Herschel in March 1834 and is easily visible through small telescopes.
NGC 3576 is a bright emission nebula in the Sagittarius arm of the galaxy a few thousand light-years away from the Eta Carinae nebula. It is also approximately 100 light years across and 9000 light-years away from Earth. [3] It was discovered by John Frederick William Herschel on 16 March 1834. [4] This nebula has received six different ...
NGC 6572 is a planetary nebula in the constellation Ophiuchus.It was discovered in 1825 by the German astronomer Friedrich Georg Wilhelm von Struve.According to several sources such as Sky & Telescope, this object received the nicknames Blue Racquetball, Emerald Nebula, Green Nebula, and Turquoise Orb.
NGC 6589 is a reflection nebula located in the constellation of Sagittarius, and it was discovered by Truman Safford on August 28, 1867. [2] In August 1905, Edward Barnard listed it as IC 4690. [ 2 ]