Galaxies
A galaxy is a massive, gravitationally bound system that consists of stars and stellar remnants, an interstellar medium of gas and dust, and an important but poorly understood component tentatively dubbed dark matter. The word galaxy is derived from the Greek galaxias (γαλαξίας), literally "milky", a reference to the Milky Way galaxy.Galaxies contain varying amounts of star systems, star clusters and types of interstellar clouds. In between these objects is a sparse interstellar medium of gas, dust, and cosmic rays. Dark matter appears to account for around 90% of the mass of most galaxies. Observational data suggests that supermassive black holes may exist at the center of many, if not all, galaxies
Read More12 / 26
NGC3521
Telescope: GSO RC10 (reduced to f/5.6)
Camera: QSI 683L
Mount: Astrophysics Mach1 GTO
Filters: Astrodon Gen2 LRGB + Ha
Subexposures: bin 1x1 Lum
Total exposure: 12h
Observatory automation: Pegasus Astro - Ultimate Powerbox v2
Autofocus: Pegasus Motor Focus Kit + UPBv2
Location: Near Gythion, Greece