The larger galaxy, dubbed the "Death Star Galaxy," has a black hole-generated energetic jet aimed at its companion galaxy. This is the first observation of its kind. (https://de.wikipedia.org/wiki/3C_321)
At 1 Kelvin, the nebula is the coldest place in space measured so far. The low temperature arises because the gas is moving away from the star at extreme speed. The expansion leads to a lowering of the temperature. (https://de.wikipedia.org/wiki/Bumerangnebel)
The circled point is a black hole, which is not in the center of the main galaxy. It is probably the center of a dwarf galaxy left over from a collision. (https://esahubble.org/images/heic1203a/)
Grus-Quartett, NGC 7552, NGC 7582, NGC 7590, NGC 7599
Apparent magnitude:
10,98 mag
Distance:
70.500.000 ly
Expansion:
923.000 ly
RA-Koordinaten:
23h 17m 56s
Dec-Koordinaten:
-42° 22' 25''
Image information
Field of view width:
52,038'
Field of view height:
41,013'
Image scaling:
2,205''/pixel
Apparent object width:
45'
Apparent object height:
45'
Notes:
The four galaxies form the Grus Quartet. It consists of NGC 7552 (right edge of image), NGC 7582 (center of image), NGC 7590 (small galaxy at the bottom) and NGC 7599 (far left).
The LBN 468 nebula complex consists of several dark nebulae:
The lower region LDN 1147 with the two dark bands LDN 1148.
The dark complete left area LDN 1158
The middle upper area LDN 1157
The upper right area LDN 1152
To the left at the top of the nebular region is another reflection nebula known as Gyulbudaghian's Nebula (GM 1-29).
Henize 3-1357, Hen 3-1357, PN G331.3-12.1, PK 331-12.1
Apparent magnitude:
15,36 mag
Distance:
19.100 ly
Expansion:
0,4 ly
RA-Koordinaten:
17h 16m 21,1s
Dec-Koordinaten:
-59° 29' 23,6''
Image information
Field of view width:
0,1''
Field of view height:
0,1''
Image scaling:
0,007''/pixel
Apparent object width:
4''
Apparent object height:
3,3''
Notes:
The Stingray Nebula is the youngest planetary nebula discovered to date. (https://de.wikipedia.org/wiki/Stingray-Nebel)
The name comes from its resemblance to the stingray. However, due to its unusually rapid shape change within the last 20 years, it has since lost its ray resemblance. (https://www.spektrum.de/news/hubble-aufnahmen-planetarischer-nebel-verblasst-extrem-rasant/1804658)
In the optical range, a normal elliptical galaxy can be seen. In the radio range, however, giant plasma jets become visible, presumably generated by the presence of a central black hole with 4 billion solar masses (1000 times the mass of the Milky Way). (https://de.wikipedia.org/wiki/Hercules_A)
The blue nebula in the image belongs to NGC 3372 (Carina Nebula).
The bright star is Eta Carinae around which is the Homunculus Nebula.
To the right of Eta Carinae is the Keyhole Nebula (the large dark cloud) and directly to the right center of it is the nebula "Defiant Finger" / "God's Birdie" / "The Finger of God"."
The 10 largest galaxies still visible here are:
UDF 7556 (center left edge - blue spiral galaxy)
UDF 4527 (centered lower edge - yellow galaxy)
UDF 2322 (diagonally on the way to the lower right corner)
UDF 3677 (bright yellow galaxy centered right)
UDF 6206 (galaxy exactly in the center)
UDF 6747 (left of the center galaxy)
UDF 9264, UDF 9204, UDF 7688, UDF 8585 (four galaxies above from left to right)
Even though IC 2177 is called the Gull Nebula, IC 2177 is not the complete nebula, but only the head, with the bright star HD 53367 in the center.
The wings are the nebula Sh2-296.
Just to the right of the head is very small planetary nebula PK 223-2.1.
Below it are the two nebulae Sh2-293 (the larger one) and Sh2-295 (the smaller one).
To the left of the two small nebulae, in the dark indentation in the wing, is the reflection nebula NGC 2327. Directly below it the cluster of stars with nebula is vdB 92.
To the left of it in the blue area near the bright stars is vdB 95.
Down at the wing tip, the bright yellow nebula, is Sh2-297.
At the upper wing (upper edge of the yellow nebula), is the star cluster NGC 2335.
The star cluster NGC 2343 is to the left of the head in the blue area.
Even further to the left, before the bright yellow area starts, is the star cluster NGC 2353. The bright yellow nebula at the upper left is Sh2-294.
The yellow area to the left of the lower wing is the carbon star W Canis Majoris.
Kohoutek 2-1, K 2-1, LBN 809, PN G173.7-05.8, PK 173-5.1
Apparent magnitude:
18,09 mag
Distance:
6.000 ly
Expansion:
3,7 ly
RA-Koordinaten:
05h 07m 09,1s
Dec-Koordinaten:
+30° 49' 28,1''
Image information
Field of view width:
29,747'
Field of view height:
21,696'
Image scaling:
1,327''/pixel
Apparent object width:
2,1'
Apparent object height:
1,92'
Notes:
The nebula was originally listed as a planetary nebula. In the meantime it is listed as a reflection nebula in SIMBAD. (https://www.deepskycorner.ch/k2-1/k2-1.php)
The LBN 468 nebula complex consists of several dark nebulae:
The lower area LDN 1147 with the two dark bands LDN 1148.
The dark complete left area LDN 1158
The middle upper area LDN 1157
The upper right area LDN 1152
To the left at the top of the nebula area is another reflection nebula known as Gyulbudaghian's Nebula (GM 1-29).
The Markarian's chain includes the following eight objects from lower right to upper left:
M84 (NGC 4374)
M86 (NGC 4406)
NGC 4435 above and NGC 4438 below (Eyes Galaxies)
NGC 4458 above and NGC 4461 below
NGC 4473
NGC 4477
Above M86 is NGC 4402 (not part of the chain).
Between M84 and M86 at the bottom of the rim is NGC 4387 (not belonging to the chain).
Minkowski 1-41, M 1-41, Hen 2-355, PN G006.7-02.2, PK 006-02.1
Apparent magnitude:
15 mag
Distance:
3.100 ly
Expansion:
1,6 ly
RA-Koordinaten:
18h 04m 13s
Dec-Koordinaten:
-22° 29' 24''
Image information
Field of view width:
149,021'
Field of view height:
148,449'
Image scaling:
4,902''/pixel
Apparent object width:
1,8'
Apparent object height:
0,88'
Notes:
At the very top center is the star cluster M21.
Diagonally right below is the Trifid Nebula M20 and diagonally right below that is Sh2-28.
At the very bottom center is the Lagoon Nebula M8 with the bright nebulae NGC 6526 (lower left) and the irregular region NGC 6533 (upper right) (separated by the slightly darker s-shaped region) and the star cluster NGC 6530 (to the left of the bright region).
To the left is the large nebula Sh2-29 with the nebula NGC 6559 (lower left) and the oblique planetary nebula Minkowski 1-41 (red dot), the star cluster IC 4685 (center), the nebula IC 1275 (upper left center), the nebula IC 1274 (above).
A little above the blue star is nebula IC 4684 and diagonally above it on the right is star cluster NGC 6546.
The beginning star cluster at the bottom of the image is M46.
The planetary nebula NGC 2438 (blue nebula in the center) is in the foreground and does not belong to M46. (According to recent investigations, it could be that the planetary nebula does interargue with the Star cluster and has the same distance. (https://arxiv.org/pdf/0710.2900.pdf)
In the upper left corner is OH 231.8+4.2 (Calabash Nebula Rotten Egg Nebula).
Fabian RRRR, CC BY-SA 3.0, via Wikimedia Commons (picture rotated), Based on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA).
The galaxy group consists of the galaxies NGC 87 (upper right), NGC 88 (center), NGC 89 (lower) and NGC 92 (upper left). Together they form Robert's Quartet.
Because of all the dust and gas in the field of view to the center of our galaxy, it is not possible to view the center optically. Radio telescopes are needed here. (https://en.wikipedia.org/wiki/Sagittarius_A*)