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The largest globular cluster in the Milky Way.
Located in the southern constellation of the Centaur, NGC 5139 is 16,500 light-years away. Its name, Omega Centauri, is reminiscent of that of a star. This is indeed what believed E.Halley when he observed it in 1677.
It is actually a globular cluster of more than 10 million stars that are billions of years old. They fit in an apparent volume equivalent to that of the full moon. (36,3')
In recent years this status of globular clusters has been called into question. Several indications suggest that Omega Centaur is actually the nucleus of an ancient galaxy.
If its visual appearance resembles that of globular clusters, Omega Centaur has some singularities:
• On the one hand it contains several populations of stars. Their time-extended formation and diversity contradicts the scenario that stars in a globular cluster are the same age and composition
• On the other hand, a stream of stars originating from the cluster has been identified, a current that is attracted to our Milky Way. These could be the remains of a nearby dwarf galaxy whose heart remains, Omega Centauri
• There is a final clue in favour of the hypothesis of a dwarf galaxy, A small galaxy that fell into the trap that the Milky Way set for it by its gravitational force,billions of years ago, and which is devoured its stars by the thousands..., little by little, piece by piece, like two other famous neighbors familiar to the inhabitants ofthe southernhemisphere: the Little and the Great Cloud.. .
Astronomers have measured the movements of 100,000 stars in the cluster. Their movements too fast can only be explained by the presence of a black hole. An exotic celestial object as found in the heart of galaxies, not globular clusters...
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Entfernung: 2,5 Mio. Lj
Durchmesserca. 140.000 Lj
LRGB
Equipment:
TS 10" f/4 ONTC Newton
1000mm f4
GPU Aplanatic Koma Korrector
Moravian CCD G2-8300FW
Astrodon LRGB Filter
Losmandy G11/LFE Photo
Guding:
Lodestar on TS Optics - ultra short 9mm Off Axis Guider
PHD2
30x600 Luminanz
6x300 RGB
total exposure time: 6:30 hour
Processing: PixInsight/Lightroom
This is a 10-min exposure of the cliffs next to Gallagher Lake outside of Oliver BC. IT is a happy accident that the image is sharp as I had to focus in nearly complete darkness. It is a further happy accident that I included Polaris in the picture.
Shutter speed 1h 20min 6s
ISO 640
Aperture f/2.8
Focal length 18mm
.
Fujifilm X-T3
Fujinon XF 18-55mm f2.8-4
jupiter taken on the 27th December by Canon eo 700D mounted to the telescope sky watcher, the conditions werent really optimal, bad seeing. on the picture there is visible jupiter with Callisto, Ganymedes, Europa at the bottom side, and up to the jupiter s Io
YouTube video:
JUPITER&CO AT 3600MM W/ TELECONVERTERS | PLAYIN' W/ ZOOM
▼ Recorded with Sony Alpha A65...
■ Settings
▪ Moons 1/8th and Jupiter 1/30th, shutterspeed
▪ Lens: Tamron 6.9/400, model FO-69 @ F6.9
° Tamron SP 2x converter BBAR MC (7)
° HELIOS 3X Auto Teleconverter
° 3600mmmm, 35mm-equiv
▪ WB: Sun
▪ ISO: moons 6400 and Jupiter 400
▪ Stabilization N/A
▪ Manual Focus on a tripod
■ Post Processing
▪ AutoStakkart alignment, RegiStax6 Wavelets
▪ Jupiter's moons 2 stacked 24Mp images
▪ Jupiter 38 stacked 24Mp images
From left to right: Callisto, Jupiter, Europa and Ganymede. Io is obscured by Jupiter itself.
Picture made with Meyer Optik 135mm and the same tripod I used iny youth with binoculars strapped to it to watch the same planet and its moons,.
Trying the new X100 for some night sky shots. This camera is great for low light, like hardly no noise.
On a clear sky night, never miss to click Moon shot
11February, 2022
EM1 Mk3 100-400IS
1/500sec, f6.3, 0ev, ISO200
#moon #astrophotography #astrophoto #sky_brilliance #sky #natgeoyourshot #natgeoyourlens #moonphotography #moonphases #moonmagick #moonnight #moonwatch #astrophotographer #astrography #olympusomd #olympusphotography #em1markiii #breakfree_olympus