The comet C/2023 P1 (Nishimura) photographed just before the dawn on September 9, 2023.
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C/2023 P1 (Nishimura)
Author: Luca Zanini
M 74 is a typical spiral galaxy in the constellation Pisces.
Here there are some photos of the Moon approximately two days after the full moon phase:
The spiral galaxy NGC 772 has an asymmetrical shape with a strongly developed spiral arm, probably caused by the gravitational action of the dwarf elliptical galaxy NGC 770.
NGC 7635, also known as the Bubble Nebula, is located in the constellation Cassiopeia and consists of a bubble-shaped nebula generated by the stellar wind of a star at its center and which is expanding into a larger nebula.
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Hunting for satellites
On August 12, 2023 I photographed Jupiter, Saturn and Uranus with the intention of identifying their satellites and for this reason the central planet is overexposed.
There are also other satellites in the pictures but they are not visible because they are too dim or too close to the planet.
The number near the name of the object is the magnitude.
The photo shows a small portion of the sky in the constellation Andromeda.
Why is this photo special?
In a portion of the sky about the size of a full moon, there are 61 galaxies:
10 galaxies from the NGC (New General Catalogue) and among these NGC 708 which is the largest galaxy in the center of the photo
1 galaxy from the IC (Index Catalogue)
50 galaxies from the PGC (Principal Galaxies Catalogue)
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The Stephan’s Quintet
The Stephan’s Quintet are five galaxies, NGC 7317, NGC 7318A, NGC 7318B, NGC 7319 and NGC 7320 of which the first four are also physically close and interacting with each other while NGC 7320 is only prospectively close to the others.
It is not an easy subject to photograph, the five galaxies have surface magnitudes between 13.00 and 13.90 and with apparent size between 0.6′ and 2.3′ and the exposure time was only one hour but they are one of the most famous astronomical picture.
M 31 or NGC 224, better known as the Andromeda galaxy, is a barred spiral galaxy about 2.5 million light-years from the Milky Way and it is the largest galaxy in the Local Group.
The glow that can be seen in the lower left is part of the galaxy M 110, a satellite of the Andromeda galaxy.
The nebula M 20 or NGC 6514, known as the Trifid nebula due to its shape, is located in the constellation Sagittarius.
