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#cluster

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2023 January 29

Barnard 68: Dark Molecular Cloud
* Image Credit: FORS Team, 8.2-meter VLT Antu, ESO
eso.org/projects/vlt/
eso.org/sci/facilities/paranal
eso.org/public/

Explanation:
Where did all the stars go? What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud. Here, a high concentration of dust and molecular gas absorb practically all the visible light emitted from background stars. The eerily dark surroundings help make the interiors of molecular clouds some of the coldest and most isolated places in the universe. One of the most notable of these dark absorption nebulae is a cloud toward the constellation Ophiuchus known as Barnard 68, pictured here. That no stars are visible in the center indicates that Barnard 68 is relatively nearby, with measurements placing it about 500 light-years away and half a light-year across. It is not known exactly how molecular clouds like Barnard 68 form, but it is known that these clouds are themselves likely places for new stars to form. In fact, Barnard 68 itself has been found likely to collapse and form a new star system. It is possible to look right through the cloud in infrared light.
eso.org/public/news/eso0102/
en.wikipedia.org/wiki/Barnard_

en.wikipedia.org/wiki/Molecule
apod.nasa.gov/apod/ap030706.ht
apod.nasa.gov/apod/ap970430.ht
ui.adsabs.harvard.edu/abs/2009
eso.org/public/videos/eso9934a
eso.org/public/news/eso9934/
astronomy.swin.edu.au/cosmos/m
apod.nasa.gov/apod/ap201206.ht
apod.nasa.gov/apod/ap221020.ht
science.nasa.gov/universe/star
starchild.gsfc.nasa.gov/docs/S

apod.nasa.gov/apod/dark_nebula
en.wikipedia.org/wiki/Ophiuchu

science.nasa.gov/ems/07_infrar

apod.nasa.gov/apod/ap230129.ht

Russia targets Ukraine’s cities with cluster munitions, raising #civilian deaths

Amid stalled peace talks, #Russia's increasingly attacking #Ukrainian #cities with #ClusterMunitions, banned for indiscriminate damage to #civilians

Civilian casualties in #Ukraine in 2025 rose 37% compared with same period last year, mostly due to #Russia’s use of #long-range explosive weapons — including #cluster munitions in densely populated cities

kyivindependent.com/russia-inc

The Kyiv Independent · Russia increasingly targets Ukraine's cities with cluster munitions, raising civilian tollBy Natalia Yermak

Jukebox Friday Night on Friday 20 June and it's Matariki, the Māori New Year in Aotearoa New Zealand.

The theme is "Reflect And Renew", so let's try a song with lines about going around in circles (moving forward and starting over):

"Then in a certain moment
I lose control and at last I am part of the machinery
(The belldog) Where are you?
And the light disappears
As the world makes its circles through the sky …"

Brian Eno and Cluster ( Dieter Moebius, Hans-Joachim Roedelius), "The Belldog" (1978)

youtube.com/watch?v=m3Ff_O62pU

If you are running a #bot account, or you toot's #privacy violating URI's and think i #repost ( #retoot ) "your" content as mine... then please remember =>

  1. it is with 99.9999% certainty not your original work, you stole it from somewhere else to make it yours
  2. You posts to much shit, I wont help boosting your #bot #account
  3. Your post contained a privacy violating URL, I put my self on the list of allowed users to #repost. I will try to remember NOT to post credit to origin posts... Please don't shoot me, You stated violating everyone #privacy, and you are of curse NOT welcome to add the link to original post as comment.
  4. If a post contains a link to a walled garden (e.g. Facebook, Cloudflare, or Quora), I will not boost it. All posts I write & all boosts from me are openly accessible to everyone.
  5. #AI Generated contents is everybody's by curt ruling, the work is NOT yours, maybe you asked the #Cluster of #Computers #thiefs to generate you something from #stolen work, that the cluster have been steeling against #License this includes and not limited to #OSS License as CC-BY-* AGPLv3 etc.
miniwa.moeMiniwa/Cute

Recently I've combined various functions which I've been using in other projects (e.g. my personal PKM toolchain) and published them as new library thi.ng/text-analysis for better re-use:

- customizable, composable & extensible tokenization (transducer based)
- ngram generation
- Porter-stemming & stopword removal
- vocabulary (bi-directional index) creation
- dense & sparse multi-hot vector encoding/decoding
- histograms (incl. sorted versions)
- tf-idf (term frequency & inverse document frequency), multiple strategies
- k-means clustering (with k-means++ initialization & customizable distance metrics)
- similarity/distance functions (dense & sparse versions)
- central terms extraction

The attached code example (also in the project readme) uses this package to creeate a clustering of all ~210 #ThingUmbrella packages, based on their assigned tags/keywords...

The library is not intended to be a full-blown NLP solution, but I keep on finding myself running into these functions/concepts quite often, and maybe you'll find them useful too...

Proxmox for Enterprises: Imagine DRS-Like Guest Load Balancing!

ProxLB automatically rebalances VMs & Containers across a Proxmox cluster based on memory, CPU, and local disk usage, and can suggest the best nodes for further automation within CI/CDs. It supports maintenance mode, affinity and anti-affinity rules, and integrates seamlessly with the Proxmox API and ACL system. No SSH, just pure API! The best - it's free & #opensource

How do we know that globular star clusters are the oldest structures of our universe? The answer is surprisingly fascinating.

Picture number 1 is my latest capture of the largest known globular cluster in the Northern Hemisphere: M13, which I believe contains approximately half a million stars.

Picture number 2 features pictures of 0.9 m Kitt Peak's Observatory telescope, together with images taken by the Hubble Space Telescope of another glob cluster: M4.

Well, it turns out that the HST could resolve, after many hours of exposures, the white dwarfs within the latter cluster. Not only that, but it could also analyze them using a technique known as spectroscopy, and determine in this way that these stars are approximately 12 to 13 billion years old.

This is not only useful for determining the cluster's age, but also for pinpointing the age of the entire universe. So, these tiny "insignificant" star remnants did us a big favor.

Replied in thread

From Wikipedia, the free encyclopedia

NGC 6366

NGC 6366 is a globular cluster located in the constellation Ophiuchus. It is designated as XI in the Shapley–Sawyer Concentration Class and was discovered by the German astronomer Friedrich August Theodor Winnecke on 12 April 1860. It is at a distance of 11,700 light years away from Earth.

NGC 6366 is similar in composition to M 71 or NGC 6342. It is metal-rich for a globular cluster, and all of its stars appears to have formed in the same epoch.

Color rendering is done by Aladin-software (2000A&AS..143...33B.)

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).

FYI: iopscience.iop.org/article/10.

#space #cluster #milkyway #astrophotography #photography #science #nature #NASA #ESA hubble #education

TOPIC>

NGC 6366 vs 47 Ophiuchi
* Image Credit & Copyright: Massimo Di Fusco
app.astrobin.com/u/massimo.dif
astronomy.com/picture-of-the-d
optolong.com/cms/document/deta
optolong.com/cms/document/deta

Explanation:
Most globular star clusters roam the halo of our Milky Way galaxy, but globular cluster NGC 6366 lies close to the galactic plane. About 12,000 light-years away toward the constellation Ophiuchus, the cluster's starlight is dimmed and reddened by the Milky Way's interstellar dust when viewed from planet Earth. As a result, the stars of NGC 6366 look almost golden in this telescopic scene, especially when seen next to relatively bright, bluish, and nearby star 47 Ophiuchi. Compared to the hundred thousand stars or so gravitationally bound in distant NGC 6366, 47 Oph itself is a binary star system a mere 100 light-years away. Still, the co-orbiting stars of 47 Oph are too close together to be individually distinguished in the image.
ui.adsabs.harvard.edu/abs/2015
ui.adsabs.harvard.edu/abs/2015
science.nasa.gov/universe/star
apod.nasa.gov/apod/ap250512.ht
app.astrobin.com/u/massimo.dif

spaceplace.nasa.gov/satellite-

apod.nasa.gov/apod/ap250523.ht