The globular cluster of Omega Centauri (NGC 5139)

The largest and the most massive globular cluster in the sky, with at least 10 million stars!
It lies in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in 1677. Located at a distance of 17,090 light-years (5,240 pc) at a diameter of roughly 150 light-years, and a total mass equivalent to 4 MILLION SOLAR MASSES. Its estimated age is about 12 billion years old!
Fun Fact 1: Omega Centauri had been included in Ptolemy’s catalog 2000 years ago as a star.
Fun Fact 2: It is speculated that Omega Centauri may be the remnant core of a dwarf galaxy that was our Milky Way’s satellite.

25×20″ – ISO 800
54×20″ – ISO 2000
30x Darks
30x Bias

Telescope: Sky-Watcher 150mm f/8
Camera: Nikon D5200 DSLR (no mod)
Mount: EQ3-2 w/ OnStep
Software: Pix + Ps
Porto Real-Brazil
Bortle 4/5 Sky

Autore: Leo Pires (sito)