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The nebula extends about 0.06 parsecs (0.20 light-years) from its center. [5] As early as 1974, the central star was known to be among the coolest carbon -sequence (type WC) Wolf-Rayet stars. [ 12 ] The nebula has a mass of 0.08 M ☉ [ 7 ] and an electron temperature, that is the average kinetic energy of electrons within the plasma , of 8,160 ...
Gyulbudaghian's Nebula (gyool-boo-DAH-ghee-an) is a reflection nebula in the northern constellation Cepheus, located about 1.5 degrees west of the much brighter reflection nebula NGC 7023. The light illuminating it comes from the T Tauri star PV Cephei .
NGC 6826 (also known as Caldwell 15) is a planetary nebula located in the constellation Cygnus. It is commonly referred to as the "Blinking Planetary", although many other nebulae exhibit such "blinking". When viewed through a small telescope, the brightness of the central star overwhelms the eye when viewed directly, obscuring the surrounding ...
See also: Lists of nebulae: NGC 2020 is an HII Region surrounding the Wolf-Rayet star BAT99-59. [2] It is located in the Large Magellanic Cloud. ... Mobile view ...
NGC 1763 (also known as N11 B, LH 10 or ESO 85-EN20) is an emission nebula with an embedded star cluster in the Dorado constellation in the Large Magellanic Cloud, It is very bright, very large and very irregular. Its apparent size is about 3.0-5.0 arcmin. [3]
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 6445, also known as the Little Gem Nebula or Box Nebula, is a planetary nebula in the constellation Sagittarius. It was discovered by William Herschel on May 28, 1786. [ 6 ] The distance of NGC 6445 is estimated to be slightly more than 1,000 parsecs based on the parallax measured by Gaia , which was measured at 0.9740 ± 0.3151 mas.
RCW 49, also known as NGC 3247, is a H II region [1] nebula located 13,700 light years away. [2] Other designations for the RCW 49 region include NGC 3247 and G29 [3] and it is commonly known as the Whirling Dervish Nebula. [4] It is a dusty stellar nursery that contains more than 2,200 stars [2] and is about 300-400 light years across. [5]