Image Description and Details :

NGC 7822 is a young star forming complex in the constellation of Cepheus. The complex encompasses the emission region designated Sharpless 171, and the young cluster of stars named Berkeley 59. The complex is believed to be some 800–1000 pc distant, with the younger components aged no more than a few million years. The complex also includes one of the hottest stars discovered within 1 kpc of the Sun, namely BD+66 1673, which is an eclipsing binary system consisting of an O5V that exhibits a surface temperature of nearly 45,000 K and a luminosity about 100,000 times that of the Sun. The star is one of the primary sources illuminating the nebula and shaping the complex's famed pillars of creation-type formations, the elephant trunks.

Détails acquisitions :
HA 105 x 300s
O3 60 x 300s
S2 63 x 300s
soit 19H total
ave la lunette askar400 + red
camera asi264MM
monture ioptron CEM120
Traitement Pixinsight et Photoshop

Copyright: Lamagat Frédéric

Image Description and Details :

The image is of the Hanle Monastery under Bortle 1 skies and the Perseids. Hanle monastery is a 17th century gompa of the Drupka lineage of the kagyu school of Tibetan Buddhism located in the Hanle valley of Leh District, Ladakh, India. Hanle lies at an altitude of about 14500ft and is also home to the Indian Astronomical Observatory . The location of the monastery and the observatory is highly sensitive due to its proximity to the disputed Chinese border and access is restricted to a very few. Image was taken on the nights of 10 and 11-Aug-21. A blue hour foreground was first shot and then when the quadrant rose, 20 images of the night sky were stacked with the meteors blended in.

Copyright: Vikas Chander and Dorje Angchuk

Image Description and Details : Ha : 91 x600". Gain 200. Bin1
[OIII]: 90x600". Gain 200. Bin1
RGB: 40x60". Gain 139. Bin1 (For stars color)
Total integration time: 32h10'

Data acquired on several nights of July and August 2021 from Belmonte and Naharros, Cuenca (Spain)

Equipment: ZWO ASI1600MM. Meade R8 200/1000. EQ6R-PRO.
Guiding: EZG60 + QHY5-L-II
Capture Software: NINA & PHD2
Processed with Pixinsight 1.8.8.7

Copyright: Alejandro López

Image Description and Details :

A spiral galaxy located in the dragon It has several stellar flows, here on the image I have only captured the left flow the rest of its large loop is very little visible or then some influences by severely pushing the transformation histo. Its stellar fluxes are remnants of dwarf or similar sized galaxies that have been disturbed and extended along its orbit. The galaxy is located 42.4 million light years away.

Atik 460ex et 200/1000 en lrvb sur 21h l..63x900sR..22x300sV..20x300sB..21x300s

Copyright: Rémi Méré

The Janssen Fabricius and Metius trio caught with low turbulence and my Newton 625mm IR685 barlow Televue 4X and QHY5III 178M . Note the three connected valleys in Fabricius.

Copyright: Luc Cathala

WR 134 is a variable Wolf-Rayet star located around 6,000 light years away from Earth in the constellation of Cygnus, surrounded by a faint bubble nebula blown by the intense radiation and fast wind from the star. It is five times the radius of the sun, but due to a temperature over 63,000 K it is 400,000 times as luminous as the Sun.

photo taken from my backyard in Carpentras (Vaucluse) France
Telescop : 10" f/4 TS ONTC Newton
Camera : ZWO ASI 294MM
Mount: iOptron CEM70
Camera autoguiding : ZWO ASI290MM Mini
Explore scientific HR COMA CORRECTOR
Logiciels: Photoshop · Nighttime Imaging ‘N’ Astronomy · PHD2 Guiding · Pixinsight 1.8
Filtres: Antlia 3.5nm OIII 36mm & 3.0nm Ha 36mm
Chroma RGB 36mm
Accessoire: PrimaLuce Sesto Senso 2
Dates:6 juillet 2021 , 7 juillet 2021 , 8 juillet 2021 , 9 juillet 2021 , 14 juillet 2021 , 18 juillet 2021 , 19 juillet 2021 , 20 juillet 2021
Images unitaires:
Antlia 3.0nm Ha 36mm: 155x240" (10h 20') (gain: 120.00) -10C bin 2x2
Antlia 3.0nm Ha 36mm: 49x360" (4h 54') (gain: 120.00) -10C bin 2x2
Antlia 3.5nm OIII 36mm: 72x180" (3h 36') (gain: 120.00) -10C bin 2x2
Antlia 3.5nm OIII 36mm: 120x240" (8h) (gain: 120.00) -10C bin 2x2
Antlia 3.5nm OIII 36mm: 43x360" (4h 18') (gain: 120.00) -10C bin 2x2
Chroma LRVB 36mm: 90x120" (3h) (gain: 120.00) -10C bin 2x2

Intégration: 34h 8'

Darks: ~64
Flats/PLU: ~7
Dark-flats: ~30
Âge de la Lune (moyen): 17.98 jours
Phase de la Lune (moyenne): 32.23%
Echelle d'obscurité de Bortle: 6.00
Centre AD: 20h 10' 22"
Centre DEC: +36° 11' 3"
Échantillonnage: 0,907 arcsec/pixel
Orientation: 1,422 degrés
Rayon du champ: 0,593 degrés

Copyright: Anthony Husson

Image Description and Details : Commonly known as the propeller nebula the ‘propeller’ shape actually consists of two catalogued parts: DWB 111 & DWB 119.
The DWB catalog was compiled by H. R. Dickel, H. Wendker and J. H. Bieritz cataloging 193 distinct objects as part of their study of H-alpha emission nebula in the Cygnus X region of the sky.
This is part of a much larger complex known as Simeis 57 in Cygnus, discovered in the early 50’s. The distance to the nebula is not known.
DWB 111 is just a small part on the left of this image. There is another very faint OIII object in the frame & I hope I can add further to the image at a later date. LDN 909 refers to the dark area just right of centre.

Imaging telescope: Takahashi FSQ130ED

Imaging cameras: FLI ML16200

Mounts: Takahashi EM 400 Temma 2

Guiding cameras: QHY CCD QHY 5 II

Focal Extender / Reducer: Tak QE 0.73x

Software: PHD 2, Astro Pixel Processer, PixInsight , Sequence Generator Pro SGP

Filters: Astrodon SII, Ha, OIII, + Astrodon RGB

Accessories: ATIK EFW3

Original Resolution: 4416 x 33596

Dates: Jul 18 - Aug 4, 2021

Frames:

Astrodon Ha: 42 x 600"

Astrodon SII: 45 x 600"

Astrodon OIII: 48 x 600"

Astrodon RGB: 3 x 10 x 180"

Integration: 24 Hours.

Copyright: Brendan Kinch

Enigmatic spiral galaxy NGC 1097 lies about 45 million light-years away in the southern constellation Fornax. The small companion galaxy, just left of center, that seems to be wrapped in its spiral arms, is not NGC 1097's most peculiar feature though. Instead, This very deep exposure shows hints of faint, mysterious jets, most easily seen to extend well beyond the bright arms toward the bottom. In fact, four faint jets are ultimately recognized in optical images of NGC 1097. The jets trace an X centered on the galaxy's nucleus, but could be fossil trails left over from the capture of a much smaller galaxy in the large spiral's ancient past. A Seyfert galaxy, NGC 1097's nucleus also harbors a massive black hole.

Copyright Good Astronomy

Close up of M20 the Trifid Nebula. Located 9000 light years away in Sagittarius Trifid is a star forming nebula. It is a very popular subject for astrophotographers. This image was taken with our RiDK 700 in LRGB Hydrogen Alpha and Oxygen III to provide a detailed close up of the Nebula and surrounding gas clouds.

Imaged at El Sauce, Obstech, Chile

Image Processing: Mike Selby

System Control Software: Voyager by Leo Orazi.

Copyright: Mike Selby

PN G136.7+61.9 is a planetary nebula in Ursa Major.

PN G136.7+61.9 is extremely faint planetary nebula with size of about 7 arcminute that was discovered in 2013 by analysing data from the SDSS spectroscopic survey. The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States. The project was named after the Alfred P. Sloan Foundation, which contributed significant funding.

This is the first colour image ever taken of PN G136.7+61.9 planetary nebula. In appearance, as well as low surface brightness, this planetary nebula could be called "Night Owl Nebula".

This image taken over several nights in May 2021.

L-channel - 52 x 150 sec. bin 1x1;

R-channel - 24 x 150 sec. bin 1x1;

G-channel - 24 x 150 sec. bin 1x1;

B-channel - 24 x 150 sec. bin 1x1;

Ha- 59 x 900 sec. bin 2x2;

OIII- 50 x 900 sec. bin 2x2.

Total integration time about 32:25 hours.

My setup: Telescope 8" Celestron Schmidt-Cassegrain (SCT) CPC800 GPS (XLT) on the equatorial wedge, focal reducer Starizona Night Owl 0.4х, Feq=864mm, camera Starlight Xpress Trius SX694, SX mini filter wheel, filters Astrodon LRGB E-series gen.2, Astrodon Ha 5nm, Astrodon OIII 3nm.

Capture and processing software: MaxIm DL6, PHD2, PixInsight, StarTools, Photoshop CC, Zoner photo studio 14.

North at the top.

Copyright: Boris Vladimirovich

Last astrophotography done mid-July on 5 straight nights.

This is Sh2- 119 show nebula from the Sharpless catalog, located in the Swan constellation.

Little photographed object, dark and H-Alpha gas areas and especially Oiii can be captured with long poses.

Especially since the moon was well present, so I used my L-Extrem filter to capture the signal from these two gases.

I used a PixInsight script from Zloch Team Astro (again thanks for all you tutorials if by chance you see this message..) to create a layer of Sulfure gas and mix all three layers into SHO - which results Interesting.

The 10 min posing times will have allowed me to be even more picky on my stationing and self-guiding. At this time we don't really have the right to ' about ' anymore.

A huge thank you to Yann Sty for all his tips: settings + treatment.

Matos+exives:

- EQM35 Pro mount driven via EQMOD

- bezel TS 71 SDQ f / 6.3

- ZWO ASI 2600 MC camera / gain 100 offset 50 / cooled to-10°C

- 90 x 600 s or 15 h with the L-extrem

- 20 x 120 sec in RGB with IDAS LPS P3 filter for stars

- 50 DOF

- pre-treatment + extraction of Ha and Oiii layers with SIRIL

- treatment with PixInsight and Photoshop.

Copyright: Nicolas Martino

Saturn and mmons taken from Réunion Island (indian océan) with C11, x2 barlox and asi224mc. we can see some moons like Mimas left top, Encelade right top and Rhéa left Bottom of saturn.
there is beautiful détails, A,B,C rings and cassini division. beautiful colors.

Copyright: Quentin Gineys

Image Description and Details :

NGC 2264, Christmas Tree Cluster, Cone Nebula
Begin, 21.02.2021, End 03.06.2021, five Nights
City: Hildesheim, Germany

Exposure:
71 x 600s H-alpha-OIII = 11,8 h
70 x 180s ´RGB = 3,5 h
Total = 15,3 h

Equipment:
Camera: ZWO ASI2600 MCpro
Telescope: Lacerta Carbon-Newton 8" (200/800)
Mount: EQ6R Pro
Gain 0, offset 20, temp -20°C
Guiding Mgen 2, dithering
No Flats, no Bias, no Darks
Software NINA, APP, PS
The first Project with the Astro Duo-Narrowband-Filter (Hα, OIII).
5 Nights, Moon 50-80 %

Copyright: Copyright: Ralf Dienst

Image Description and Details :

Solar activity continues and it seems that it is increasing, that is why we expect more solar landscapes like this, every day, every minute, a different landscape, you have to be there to capture it, here I managed to capture the solar activity of last July. 24 from Dallas, Texas.

Copyright: Arturo Buenrostro

Image Description and Details :

A real challenge! Through the smoke of Canadian forest fires, during a full moon and under a Bortle 9 sky, I took this picture of the Tulip Nebula (SH2-101) with about 10 hours of exposure in SHO from Montreal. I struggled with the processing, especially to bring out the weak OIII signal…
Interesting thing here, we can see the Cygnus X-1 binary system (above the Tulip nebula on the picture). It is a high mass X-ray binary system, it is a galactic source of X-rays. It was the first source of this type to be considered as a black hole.

TSA102
CEM70
Chroma 3nm filters
QHY294M

Copyright: Jonathan Durand

Image Description and Details :

The NGC 6188 emission nebula is found near the edge of an otherwise dark large molecular cloud in the southern constellation Ara, about 4,000 light-years away from us. Born in that region only a few million years ago, the massive young stars sculpt the fantastic shapes and power the nebular glow with stellar winds and intense ultraviolet radiation. The recent star formation itself was likely triggered by winds and supernova explosions, from previous generations of massive stars, that swept up and compressed the molecular gas. The field of view spans about four full Moons, corresponding to about 150 light years at the estimated distance of NGC 6188.

Telescope : Astro Physics 12″ Riccardi-Honders f3.8
Camera : ZWO ASI6200
Mount: Software Bisque Paramount ME II
Pixel scale : 1.07 arcsec/pixel
FOV : 88 x 66 arcmins
Filters :SHO & RGB for stars
2 panel mosaic
Integration: 21hrs each panel total 42 hrs
Sii 14x30m Ha 14x30m Oiii 14x30m
R 3x10m G 3x10m B 3x10m

Copyright: vikas chander

Image Description and Details : The Prawn Nebula was taken with my own backyard observatory, in Posadas city, Argentina, during march 2021 and processed in july 2021. More than 26 hours of exposure were integrated.

Equipment:
Imaging telescope: Skywatcher Esprit 120 ED Super APO Triplet
Imaging camera: QHY 16200A
Mount: SkyWatcher EQ6R-PRO
Guiding telescope: Sky-Watcher Evoguide 50 APO Refractor
Guiding camera: QHY5III-462C
Software: Main Sequence Generator Pro · Photoshop CC · PHD 2 · Pixinsight
Filters: Baader Planetarium SII 2" 8.5nm · Baader Planetarium H-Alpha 2" 7nm

Frames:
H-Alpha: 42x900" (10h 30') -20C bin 1x1
SII: 40x900" (10h) -20C bin 1x1
OIII: 25x900" (6h 15') -20C bin 1x1

Integration: 26h 45'

Avg. Moon age: 15.88 days
Avg. Moon phase: 84.70%
Bortle Dark-Sky Scale: 8.00

Copyright: Christian Hilbert

Image Description and Details : NGC 6744 - I started this project at the end of May, capturing data over a total of 10 nights. This intermediate spiral galaxy is bigger than the Milky Way, with a disk stretching 175,000 light-years across. A small, distorted companion galaxy is located nearby, which is similar to our galaxy's Large Magellanic Cloud. This companion, called NGC 6744A can be seen in the main galaxy's outer arm in the upper left of this image.

Lights -
Lum: 529 X 60 sec
Red: 200 X 60 sec
Green: 200 X 60 sec
Blue: 200 X 60 sec

Darks - 50
Flats - 50 per filter
Flat darks - 50 per filter

Total integration time - 18.82 hours

Equipment

Telescope - @celestronuniverse Edge HD 800
Camera - @zwoasi ASI294MM Pro
Filters - Optalong L-Pro & Baader RGB filters
Mount - SW EQ6-R Pro
Focuser - @primalucelab ESATTO 2”
Guidescope - Astromania 70mm guidescope
Guide camera - @zwoasi 120mm
Controller - Pegasus Astro Pocket Powerbox

Main processing steps in Pixinsight

For Luminance data

1. Calibration, registration, normalisation & stacking
2. Dynamic background extraction
3. Deconvolution
4. MultiscaleLinearTransform
5. Histogram stretch
6. Curves

For the Colour data

1. Calibration, registration, normalisation & stacking
2. Dynamic background extraction
3. MultiscaleLinearTransform
4. Histogram stretch
5. Curves

For the RGB image

1. ChannelCombination
2. Dynamic background extraction
3. PhotometricColorCalibration
4. SCNR
5. Histogram stretch
6. Extract Luminance from RGB image
7. Apply LRGBCombination (L only) on RGB image repeatedly until colours are saturated
8. Convolution

For LRGB image

1. Apply Luminance date using LRGBCombination (L only)
2. Curves
3. MorphologicalTransformation

Copyright:Peter Dunsby

Image Description and Details :

Transit from Ganymede 25 July 2021
Average night conditions due to fine mist. The idea was to make a Gif of the Ganymede transit with at least 1 hour of duration, but due to fog the light conditions varied a lot, which would prevent having a homogeneous Gif.
Good thing Ganymede himself came out with good definition, note that especially in the image with the infrared filter the dark region of Edfu Facula at 2 am and the light region of Osiris at 6 am are perfectly distinguishable in the photo, which shows that they are not artifacts.
PS: The high resolution image of Ganymede was taken from the Virtual Planet Atlas.

Copyright: Astrovani

Image Description and Details :

Recording dates:

Photo taken in: July 2021
Location: Upper Austria
Distance: 6000 light years
Diameter: 50 light years
Exposure: 66 x 300 sec. For RGB
27 x 900 sec. With dual narrowband
Total: 12.2 hours

Calibration: Darks / Flats / DarkFlats
Mount: Skywatcher EQ6-R PRO
Telescope: Lacerta 10 ″ Photo Newton 250/1000
Corrector: Lacerta GPU coma corrector
Filter: Astronomik L2 UV-IR block
2 ″ Optolong Filter L-eXtreme 2 ″

Camera: QHY268c @ Gain 0 at -15 ° C
Guiding: ZWO OAG with QHY5III462c and PHD2
Software: APP / Photoshop CC

Copyright: Daniel Nimmervoll