NGC 6995 – The Bat Nebula is a portion of a bigger nebula called Veil Nebula,. a supernova remnant (SNR) is the structure resulting from the explosion of a star in a supernova. The Veil Nebula consists of two loops, called Eastern Veil and Western Veil Nebula. The Bat nebula is part of the Eastern Veil Nebula
The nebula was discovered on 5 September 1784 by William Herschel. He described the western end of the nebula as “Extended; passes thro’ 52 Cygni… near 2 degree in length”, and described the eastern end as “Branching nebulosity … The following part divides into several streams uniting again towards the south.” When finely resolved, some parts of the nebula appear to be rope-like filaments. The standard explanation is that the shock waves are so thin, less than one part in 50,000 of the radius, that the shell is visible only when viewed exactly edge-on, giving the shell the appearance of a filament. At the estimated distance of 2400 light-years, the nebula has a radius of 65 light-years (a diameter of 130 light-years). The thickness of each filament is 1⁄50,000th of the radius, or about 4 billion miles, roughly the distance from Earth to Pluto. Undulations in the surface of the shell lead to multiple filamentary images, which appear to be intertwined.
Telescope: Skywatcher PDS 250/1280 – Camera: ZWO ASI 533 MC-Pro – Guide tube: 60 / 240mm – Guide camera: ZWO ASI 120 MCS – Mount: Skywatcher EQ6-R
Taken on 2022/090/05 – 16 shots of 300 ″ – Temp -10º – Dark Frames – Bias Frames – Flat Frames
Processing done entirely with PixInsight