Starship Asterisk*

A planetary nebula with a bow shock front
Copyright: Jonathan Talbot

Heckathorn-Fesen-Gull 1 (HFG1) is a faint planetary nebula in Cassiopeia with a pronounced bow shock. HFG1 was discovered in 1982 and is also known as PK 136+05.1. HFG1 was formed by the mag 14.5 star V664 Case which is actually a binary star with a white dwarf and sun like component. These two stars are a few million kilometers apart and orbit each other every 14hrs. This pair is moving rapidly through the Milky Way and this rapid movement is causing the blue/green bow shock arc you can see in the image above. Opposite the direction of movement is a red tail of hydrogen gas.

Also within the image is the planetary nebula Abell 6. This planetary nebula is about 3 arc minutes in size and was discovered by George Abell in 1955. Its also blue/green due to doubly ionized oxygen (OIII) and has red hydrogen (HII) filaments. Abell 6 also goes by the designation PK 136+ 04.1.
https://www.starscapeimaging.com/HFG1/HFG1.html

Veil Nebula -Pickering's Triangular wisp
in H-alpha, Sulfur-ii , Oxygen-iii
William Optics 103mm/ASI183MM/
Location: SK, Canada
Copyright: Ian Barredo
https://www.astrobin.com/kc2lm4/0/

The globular cluster of stars M72 (NGC 6981)


M72 (NGC 6981) is a globular cluster in the constellation Aquarius, at a distance of approximately 50,000 light-years from Earth, it is one of the most distant clusters that make up the Messier catalogue.
It's not very dense, only Messier 71 and Messier 56 are less dense than M72.
It was discovered by Pierre Méchain on August 29, 1780, being the first of five star clusters that Méchain would discover while helping Messier.

BEST DETAILS:
https://www.astrobin.com/full/wrsdxd/D/

EQUIPMENTS:
ZWO ASI 6200MC
Esprit 1500mm

08/01/2021
Location: Jales - SP - Brazil

Copyright: Fernando Oliveira de Menezes
(Organizing author of the book Astrofotografia Amadora no Brasil
https://clubedeautores.com.br/livro/ast ... -no-brasil

Blue Horsehead Nebula

https://www.astrobin.com/users/YovinRY/
Copyright: Yovin Yahathugoda


Full quality version here: https://www.astrobin.com/download/dxdw60/0/real/

Telescope - Takahashi FSQ-106ED
Camera: FLI PL16803
Filters: Astrodon E-Series LRGB
Software: Photoshop 2020 & PixInsight
Location - Heaven's Mirror Observatory, Australia

Lum - 13x600s
Red - 16x600s
Green - 16x600s
Blue - 16x600s
Total Exposure time - 10.1 hours
Full acquisition details at https://www.astrobin.com/dxdw60/

Comet Leonard & NGC4631 Whale galaxy + NGC4656 by Cedric BEGUE, sur Flickr

Comet C/2021 A1 Leonard with NGC4631 and NGC4656
Shot from France east of Paris November 24th around 5:00 AM UT
55x 20s sub exposures with Celestron RASA11 telescope, iOptron CEM70 mount, ZWO ASI183MC Pro camera.

The California nebula, processed from DSS2 data by Prof. Greg Parker at the New Forest Observatory.

A dense part of the Milky Way in Cygnus imaged using 200mm prime Canon lenses and M26C OSC CCDs at the New Forest Observatory UK.

Venus on November 26th, 22:29ut. Getting large in size but less surface details as the crescent becomes narrower. ( LX200ACF 305mm, ASI183mm Pro, Astronomik IrRGBUv filters.

Moons during daylight
Some people think that the moon can only be seen at night. In fact, if you look up at the sky, you will often find that not only the moon can be seen during the day, but the moon during the day is very charming, especially the moon under a clear blue sky.
This combined photo is the daytime moon I collected for nearly 5 years. It contains all the daytime moons of all ages. In addition to the rich and beautiful colors, the most special thing about this photo is that you can see the relationship between the moon and the sky.
The first few pictures in the first row and the last few pictures in the fourth row: The young moons and the old moons are near the sun, so they can only be observed during a short period of time when the sky is still bright around sunset and sunrise. It is pink or off-white with the sun nearby. At dawn, the thin crescent in the pink sky is the biggest motivation for people to get up early and observe, because it is so beautiful.
The last few photos of the second row and the first few photos of the third row: The nearly full moon appears opposite the sun, so I want to see the moon in the daytime only when the moon rises or the moon sets near the horizon. At this time, the sun is on the opposite side, so the sky near the moon appears dim blue-gray. The full moon during the day is the most difficult to observe, because it can only be observed for a short period of time when the moonrise or the moonset is still bright. In the summer, the daytime is longer and there is a chance to observe it. But the weather in the summer afternoon is often bad in Taiwan, so in the past five years I could barely get a picture of the full moon on a misty day (the last one in the second row).
The last few photos of the first row to the first few photos of the second row and the last few photos of the third row to the first few photos of the fourth row: The most dreamy and attractive daytime moon is the moon near the first quarter and last quarter! At this time, the angle of view between the moon and the sun in the sky is about 90 degrees, and the sky is the bluest! So when there is a moon, you will see a bright moon in the blue sky, beautiful and dreamy.
In the photo, you can also see the obvious change in the size of the moon. This is because the moon's orbit is slightly elliptical, and the distance to the earth varies. So the moons appear to be different in size.

SH2-284
Click on image to enlarge

Full info & higher resolution image @ https://www.kinchastro.com/sh2-284-2021.html

Sh2-284 is a HII star forming region of gas and dust located in the constellation Monoceros approximately 15 thousand light years from the Earth. This remarkable nebula resembles the more familiar Rosette Nebula (Caldwell 49). Along the edges of Sh2-284 are several "elephant trunk" formations. These are monstrous pillars of gas and dust that stretch into the central void of the nebula. Perhaps the most prominent of the pillars is located to the left center. It resembles the forefinger of a hand pointing to the stars in the center of the nebula. These pillars are formed by intense radiation and stellar winds radiating from the very hot stars of the central open cluster designated Dolidze 25. The radiation and wind from the cluster is responsible for clearing the central void in the surrounding nebula. Dolidze 25 is a very young cluster with an estimated age of approximately 3 to 4 million years.

Antares region

URL: https://www.facebook.com/tommaso.m.stella
Copyright: Tommaso Massimo Stella

Lights: 129x300s (11h total integration)
Apo refractor Takahashi FS-60CB, QHY 168C
Taranto (Italy)

Elephant’s Trunk Nebula

The Elephant’s Trunk Nebula is a dense region of dust and gas found within the considerably larger star forming region IC 1396 in Cepheus constellation. Designated IC 1396A, the elongated globule of dust and gas was named the Elephant’s Trunk because it resembles an elephant’s head and trunk at visible wavelengths, appearing as a dark patch with a bright winding rim. It is located at a distance of 2,400 light years from Earth.

Total exposure: 30 hours 20 minutes
Location: Georgetown, Texas

The Great Orion Nebula and surrounding dust by William Ostling, on Flickr

Full write up here: https://theastroenthusiast.com/messier- ... ebulosity/
This image showcases the bright orion nebula and its surrounding dust. The bright central nebula is lit by the star cluster at its center; the rest of the dust is a combination of glowing red hydrogen and darker, cooler dust. Some notable features in this image include the tip of the horsehead nebula on the bottom left, and the dark trail of dust including NGC 1999 on the right.

This image combines 28 hours of long exposure with 30 minutes of short exposure to preserve dynamic range. 8 hours of data were discarded to create a sharper image.

Website: https://theastroenthusiast.com/
Instagram: https://www.instagram.com/the_astronomy_enthusiast/

NGC 1566 with SN 2021aefx

NGC 1566 (ESO 157-20, PGC 14897 and others) is an intermediate spiral galaxy located approximately 20 million light-years away in Dorado. The bright blue star just to the right below the center of the galaxy is supernova SN 2021aefx. Caught near peak brightness, more information can be found here - https://www.rochesterastronomy.org/supe ... l#2021aefx or here - https://www.wis-tns.org/object/2021aefx.

Luminance – 12x600s – 100 minutes – binned 1x1
RGB – 8x600s – 40 minutes each – binned 1x1

240 minutes total exposure – 4 hours

Imaged November 23rd through the 30th, 2021 at the El Sauce Observatory (Rio Hurtado, Chile) with a FLI PL 9000 on a PlaneWave CDK24 at f/6.5 3974 mm.

LRGB - https://www.flickr.com/photos/dcrowson/ ... 9/sizes/l/
LRGB with the SN annotated - https://www.flickr.com/photos/dcrowson/ ... 0/sizes/l/

Down-sampled, Cropped image here:

Comet Leonard, C/2021 A1, UT 2021-11-30 12:34.
10x30s L, 10x30s R, 10x30s G, 10x30s B (20 minutes total).
QSI660 camera on a 10" RC, imaged from Colorado. Image is 21.3 x 17.1 arcminutes, 0.93 arcsec/pixel. Seeing was about 2.5 arcsec.
Processed in PixInsight.
_

dcrowson wrote: ↑Tue Nov 30, 2021 11:07 pm NGC 1566 with SN 2021aefx

NGC 1566 (ESO 157-20, PGC 14897 and others) is an intermediate spiral galaxy located approximately 20 million light-years away in Dorado. The bright blue star just to the right below the center of the galaxy is supernova SN 2021aefx. Caught near peak brightness, more information can be found here - https://www.rochesterastronomy.org/supe ... l#2021aefx or here - https://www.wis-tns.org/object/2021aefx.

Luminance – 12x600s – 100 minutes – binned 1x1
RGB – 8x600s – 40 minutes each – binned 1x1

240 minutes total exposure – 4 hours

Imaged November 23rd through the 30th, 2021 at the El Sauce Observatory (Rio Hurtado, Chile) with a FLI PL 9000 on a PlaneWave CDK24 at f/6.5 3974 mm.

LRGB - https://www.flickr.com/photos/dcrowson/ ... 9/sizes/l/
LRGB with the SN annotated - https://www.flickr.com/photos/dcrowson/ ... 0/sizes/l/

Down-sampled, Cropped image here:

Thanks a billion, I love it! The galaxy itself is a beauty, it looks very fine in your picture, and I just love the bright and blue supernova. Its blue color makes it extremely likely that this is a supernova type Ia, an exploding white dwarf, and indeed it is. I checked your Rochester astronomy link to confirm it.

Thank you!

Ann

Valchiusella, Italian Alps.
Looks like Orion the Hunter, tired from the path made along the sky, wants to immerse himself in the waterfall to relieve his tired feet.

Canon 6D IR modified
Samyang 24 mm f/1.4
ISO 3200, 15 s, f/1.4
Diffusion filter
Moonlight and a bit of headlamp to lit up the shadows on the left
Single shot
Shot at 4:26 AM CET of 28-11-2021

https://cosmoedintorni.org
Copyright: Emanuele Balboni

NGC281 HUBBLE PALETTE

It looks like a cave carved into the cosmos, in reality it is a wonderful nebula.

It is in fact the NGC 281 nebula, a cloud of ionized gas that emits light of various colors thanks to the stars present in the IC 1590 cluster which, with their energy emissions, excite the gas atoms of the cloud that surrounds it.

It is nicknamed the Pac-Man Nebula due to its resemblance to the colorful protagonists of the famous 1980s video game.
Turn your head to the left if you want to try to see the little head with its mouth open, ready to eat the orange dots!

This beautiful deep-sky object shines near Shedir, the brightest star in the Cassiopeia constellation, at an uncertain distance but between 5,500 and 9,500 light-years.

ORION UK 10"
QHY268M
10MICRON GM2000
FILTRI ANTLIA PRO 36mm
H 46X300 BIN2
OIII 53X300" BIN2
SII 56X300" BIN2
COSTALPINO SIENA

Seven sisters and a baby eagle

The Seven Sisters also known as The Pleiades is an open star cluster in the constellation Taurus. It is among the star clusters nearest to Earth, and is most obvious to the naked eye in the night sky. This object is located on the bottom left of this image.

Located on the top right is a very faint nebula known as the Baby Eagle Nebula (LBN 777) that is surrounded by a dusty molecular cloud.

The constellation of Taurus contains some beautiful molecular clouds and reflection nebulae.

Total integration: 24.5 hours
Location: Georgetown, Texas

Hello folks here M42
Telescope: Officina Stellare RH200
Guide Scope:Prima Luce
Mount : Skywatcher NEQ6
Imaging camera: ZWO 2600MC
Guiding camera: QHY 5ii
Filters: N/A
Plate solving: SGpro
Imaging software: Sgpro
Guiding software: PHD2
Processing software: Pixinsight
Frames:60X120s /60X10s exposure@100Gain
Integration: 1.10hrs
In collaboration with Darko Prlenda
Copyright @Davide Mancini

NGC7635 - The Bubble Nebula
Imaged above, in this colorful image of perhaps one of the most intriguing objects in our Milky Way galaxy: a massive star trapped inside a bubble. Object NGC 7635, better known as the Bubble Nebula, is located about 7,100 light-years away in the Cassiopeia constellation. Its star burns a million times brighter than our sun and produces powerful gaseous outflows called stellar winds that howl at more than four million miles per hour. Over time, the winds have pushed nearby gas and dust outward, forming a layer around the star that’s denser in some areas than others.

Gear Used for Capture:
Telescope - Explore Scientific ED127 FCD100
Camera - ZWO ASI2600MM Pro
Filters - Astronomik SII, HA, OIII 12nm 2"
Mount - Skywatcher EQ6-R Pro
Field Flattener - Hotec 2" SCA Field Flattener

Integration:
SII - 30x300s
HA - 30x 300s
OIII - 30x300s

Processed in Photoshop and PixInsight

Captured at Cherry Springs State Park, PA on November 5th and 6th 2021

I recently took this image of the Heart Nebula in SHO. I hope you all like it.

23 hours of 5 minute exposures. (Many hours discarded to use only the sharpest).

Gear; Ioptron Cem 40. William Optics Redcat 51 Telescope, ZWO ASI 183mm pro camera, Antila 3.5nm SHO filters.

Heart_Nebula_Crop by Ronan Hunt, on Flickr

Heart_Nebula by Ronan Hunt, on Flickr

M42 - The great Orion nebula
4h exposure time

Image aquision and processing: Stefan Muckenhuber

Mare Orientale, a rare view from Earth during extreme libration by Tom Glenn, on Flickr

This image shows the Mare Orientale region during a particularly rare combination of extreme librations in both latitude and longitude, and therefore shows the maximum extent of the region that is ever visible from Earth. Mare Orientale is a spectacular multi-ringed impact basin located on the far western limb of the Moon. Unfortunately, it is difficult to observe from Earth except during periods of favorable libration. In this image, the Mare Orientale basin is located at top center near the lunar limb, and is composed of a series of circular mountain ranges that surround the darker central mare basalt.

Link to a cropped region of the image with labels:
https://flic.kr/p/2mNsW1N

Link to a Lambert cylindrical projection of the image:
https://flic.kr/p/2mNsXUh

This image was captured on November 27, 2021, at 13:26UT from San Diego, CA using a C9.25 Edge HD telescope and ASI183mm camera. Combined libration effects of this magnitude for both latitude and longitude simultaneously are rare. In fact, a combined effect of this magnitude will not repeat until the year 2027, although there is another good opportunity to view the Mare Orientale region later this December as the waning Moon approaches Last Quarter around Christmas.

Mare Orientale has a very interesting history in lunar observation. The "Eastern Sea" is actually located on the western limb of the Moon, because the feature was named before the convention for labeling east and west on lunar maps was reversed in 1961. There had been much speculation among astronomers about the nature of this potential impact basin, based upon careful observation of the foreshortened lunar limb made during favorable librations. However, details of the remarkable feature were not fully appreciated until spacecraft images became available, most notably the 1967 images from Lunar Orbiter 4 which revealed the region to resemble a striking bullseye.

IC410