Great Andromeda Galaxy M31
The Andromeda Galaxy is a spiral galaxy approximately 2.5 million light-years away in the constellation Andromeda. It is also designated as M31 or NGC 224, and is often referred to as the Great Andromeda Nebula in older texts.
Andromeda is the nearest spiral galaxy to the Milky Way, but not the closest galaxy overall. As it is visible from Earth as a faint smudge on a moonless night, it is one of the farthest objects visible to the naked eye, and can be seen even from urban areas with binoculars.
It gets its name from the area of the sky in which it appears, the Andromeda constellation, which was named after the mythological princess Andromeda. Andromeda is the largest galaxy of the Local Group, which consists of the Andromeda Galaxy, the Milky Way Galaxy, the Triangulum Galaxy, and about 30 other smaller galaxies.
Although the largest, Andromeda may not be the most massive, as recent findings suggest that the Milky Way contains more dark matter and may be the most massive in the grouping. Based on recent research M31 contains one trillion stars, more than the number of stars in our own galaxy, which is estimated to be c. 200-400 billion.
Photo Details
Telescope: CFF92 apo (at 420 mm)
Camera: Asi2600 mm p
Mount: NJP Takahashi
Guiding: Off-axis Lodestar
Exposure: L 40x3min RGB 6x5min each
When: July-August 2021
Other information: L Taken in the city of Tarnow, RGB under great darsk sky
Photo Details
Telescope: FSQ EDX Takahashi
Camera: Sbig ST-8300, FW-5, Baader 36mm LRGB
Mount: NJP Takahashi
Guiding: Orion-80ST, Orion autoguider
Exposure: L 25x5min, RGB 12x8min
When: Summer 2012
Other information: Taken from the city of Tarnow
Photo Details
Telescope: Sky90II at f/4.5 Takahashi
Camera: Canon 350D Baader IR filter
Mount: NJP Takahashi
Guiding: Orion80ST, QHY5
Exposure: 20x480sec, iso800
When: September 2009
Other information: great transparency, good seeing, no LP
Photo Details
Telescope: Canon L 200mm 2.8
Camera: Asi1600 MMC-pro
Mount: NJP Takahashi
Guiding: ungaided
Exposure: LRGB 70,20,20,20 x 1 min
When: August 2018
Other information: river valley, some fog, good seeing