Astronomy every Thursday
An absolutely stunning image by member Kevin Langford of The North America Nebula (NGC 7000 or Caldwell 20). The North America Nebula is an emission nebula in the constellation Cygnus, close to the star Deneb.
ES 102ED APO, 0.7x focal reducer corrector, EQ5 Pro
ZWO ASI071, Orion MMAG,L-eNhance filter
1 1/2 Hrs of exposures
30/08/22
Bexley Kent
To see a higher resolution photo of the image check out Kevin's Flickr page at www.flickr.com/photos/77708720@N08/52383552499/
Dr. Mike Rushton took advantage of some clear skies recently (25th April 2022) and took these 3 super deepsky images using his eVscope of Messier 13, Messier 51 and the Bow Tie Nebula.
Messier 13 (M13) also designated NGC 6205 and also called the Great Globular Cluster in Hercules and the Hercules Globular Cluster, is a globular cluster of a several hundred thousand stars in the constellation of Hercules.
Messier 51, known as The Whirlpool Galaxy and as Messier 51a, M51a, and NGC 5194, is a spiral galaxy found in the constellation Canes Venatici, M51 was the first galaxy to be classified as a spiral galaxy and is 31 million light-years away from Earth.
The Bow Tie Nebula also designated NGC 40 and Caldwell 2 is a planetary nebula discovered by William Herschel in 1788. It is composed of hot gas around a dying star. The nebula gets its name from the fact it has an intriguing bow-tie shape.
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3Hrs of exposures.
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To see this image in more detail and to see Kevin's other superb astro images check out his flickr page at https://www.flickr.com/photos/77708720@N08/
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The Double Cluster is the common name for the naked-eye (OK you will need Binoculars in light polluted areas such as Crayford) open clusters NGC 884 and NGC 869, which are close together in the constellation Perseus. NGC 884 and NGC 869 are at distances of 7600 and 6800 light-years away, respectively, so they are close to one another in space as well.
They are relatively young clusters, with NGC 869 5.6 million years and NGC 884 at 3.2 million years according to the 2000 Sky Catalogue. In comparison, the Pleiades have an estimated age ranging from 75 million years to 150 million years.
They are also blue-shifted, with NGC 869 approaching Earth at a speed of 22 km/s and NGC 884 approaching at a similar speed of 21 km/s. Their hottest main sequence stars are of spectral type B0.
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Imaged by: Julian Tworek
Method: AstroTrac Canon 100-400 lens @ 200mm ISO800, 9 x 120s self modified Canon 20D DSLR
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Image of the Double Cluster taken from Kelling Heath with a Canon 600D, Modified with the Full Spectrum Mod and a Clip-in CLSCCD filter
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Image by Simon Dawes taken on 2010-09-13
Taken at Kelling heath using a Williams Optics ED80 and Canon 650D on a vixen GPDX mount (unguided)
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Image by Neil Webster - No Details Provided
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The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, more on wikipedia
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Image by Neil Webster No details Provided[/caption]
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The Owl cluster, not to be confused with the Owl Nebula is Caldwell object 13 and open cluster in Cassiopeia. It is a lovely object that really resembles an Owl - or I think WALLL-E or Johnny 5. Great in smallish telescopes.
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NGC5694 is a small globular cluster in eastern edge of Hydra. The cluster has a diameter of only 3.6 arc minutes and a visual brightness of 10th magnitude. And the distance to the cluster is 105 thousand light years, very far as for globular cluster.
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Imaged by: Debrah Holton
Method: 2m Faulkes Telescope
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The Rosette is a popular object for imagers, the complex has the following NGC designations:
The cluster and nebula lie at a distance of some 5,200 light years from Earth (although estimates of the distance vary considerably) and measure roughly 130 light years in diameter. The radiation from the young stars excite the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses.
It is believed that stellar winds from a group of O and B stars are exerting pressure on interstellar clouds to cause compression, followed by star formation in the nebula. This star formation is currently still ongoing.
A survey of the nebula with the Chandra X-ray Observatory in 2001 has revealed the presence of very hot, young stars at the core of the Rosette Nebula. These stars have heated the surrounding gas to a temperature in the order of 6 million kelvins causing them to emit copious amounts of X-rays.
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Image by Brian Thompson
17th March 2016
10" Newtonian, Mono ATIK 383L, filters, 9 x 5 min exposures
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Image by Julian Tworek using a DSLR and unknown telescope.
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Imaged by Keith Rickard
SBIG ST-7XME CCD camera with a 200mm telephoto lens, F9, 3 x 2min images in red, green and blue and 5 x 2min images in luminance
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Imaged by Simon Dawes
Imaged on 2019-01-29
I'd taken 2hrs of images but wasn't able to get Deep sky stacker to stack more than 56 minutes.
Taken with a Canon 600D (Full Spectrum Mod) with a CLSCCD filter on a Skywatcher MN190, mounted on an EQ6 Pro
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Imaged by Kevin Langford
Imaged on 2019-02-254 Hrs of exposures
ES 102ED APO, EQ5 Pro
ZWO ASI071, Orion MMAG, UHC & PL Filter
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NGC 2244 Rosette Nebula Stack of 59 x 105 Seconds light frames (1 Hour 43 Minutes and 15 Seconds) at ISO 3200
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C46 is a variable nebula located in the constellation Monoceros. It makes an interesting object to observe because of its variability
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Imaged by: Andy Wilson
Method: LX200 8", MX916 CCD
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The 'Western Veil' or Witches Broom Nebula is part of the Cygnus Loop, other parts of the loop include , the 'Eatern Veil' (Caldwell 33), and Pickering's Triangular Wisp. It is part of a large, relatively faint supernova remnant in the constellation Cygnus. The source supernova exploded some 5,000 to 8,000 years ago, and the remnants have since expanded to cover an area of ~3x3 degrees. The distance to the nebula is not precisely known, with estimates ranging from 1,400 to 2,600 light-years.
The analysis of the emissions from the nebula indicate the presence of oxygen, sulfur, and hydrogen.
The nebula is notorious among astronomers for being difficult to see visually, even though it has a bright integrated magnitude of 7. However, a telescope using an OIII filter (a filter isolating the wavelength of light from doubly ionized oxygen), will allow an observer to see the nebula clearly, as almost all light from this nebula is emitted at this wavelength. Using an 8-inch (200 mm) telescope equipped with an OIII filter, one could easily see the delicate lacework apparent in photographs. With an OIII filter, almost any telescope could conceivably see this nebula, and some argue that it can be seen without any optical aid, excepting an OIII filter held up to the eye. This is also one of the largest, brightest features in the x-ray sky.
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Image by Julian Tworek
Canon 100-400 Lens @200mm ISO 1600 modified Canon 20D Taken at Kelling Heath Star Party
The Western Veil is the nebula in the Middle of the image
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Image by Julian Tworek
Canon 100-400 Lens @200mm ISO 1600 modified Canon 20D 17 x 120s Taken at Kelling Heath Star Party
The Western Veil is the bright nebula in the top right of the image
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Image by David Sheehan
Veil Nebula (The Western Veil is in the bottom left of the image)
Sky Watcher Equinox 80ED
Canon EOS500D (Modified + CLS filter)
Kelling Heath Norfolk
2013-10-05 22:30 (Mid exposure)
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