NGC 6188 – as it is officially known – is an emission nebula in the constellation Ara at a distance of about 4,000 light years. ngc 6188 – as it is officially known – is an emission nebula in the constellation Ara at a distance of about 4,000 light years. NGC 6188 is an emission nebula in the constellation Ara at a distance of about 4,000 light years. NGC 6188 is an emission nebula at a distance of about 4,000 light years in the constellation Ara.
NGC 6188 is an active star-forming region where newborn star giants form the incredible shapes of dark cosmic dust and make the surrounding gas glow by bombarding it with streams of charged particles called stellar winds. This nebula is located in the open star cluster NGC 6193, which is invisible to the naked eye and is mainly responsible for lighting up the outlines of the “Fighting Dragons”. If you missed it, at the bottom left of this image you will find another nebula, NGC 6164, a rare emission nebula.
Where is NGC 6188 located?
The emission nebula is near the edge of an otherwise dark large molecular cloud in the southern constellation Ara, about 4 000 light years away. I have seen it called the “Fighting Dragons of Ara” or “Fighting Dragon Nebula” – but I have not seen this name used by any official organisation). The image below is of NGC 6188 from the Digitized Sky Survey 2 (DSS2 – see imprint), taken in the red channel. Also visible in this image is the open cluster NGC 6193 (off centre, near the bottom, with the bright pair HD150136 and HD150135, both O-type stars).
What is the energy source of the typical emission nebula?
H II region, also called diffuse nebula or emission nebula, interstellar matter consisting of ionised hydrogen atoms. Bright nebulae are close enough to nearby stars to glow, and the way they produce this glow depends on two factors. Since the typical lifetime of stars is measured in billions of years, planetary nebulae therefore represent a brief period of brilliance near the end of a star’s life. Nevertheless, these objects can glow faintly as gravity continues to shrink them, releasing energy in the process.
The most common source of ionisation is high-energy ultraviolet photons emitted by a nearby hot star.