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#cluster

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Replied in thread

2025 July 26

Globular Cluster Omega Centauri
* Image Credit & Copyright: Data acquisition - SkyFlux Team, Processing - Leo Shatz
app.astrobin.com/u/spinlock#ga

Explanation:
Globular star cluster Omega Centauri packs about 10 million stars much older than the Sun into a volume some 150 light-years in diameter. Also known as NGC 5139, at a distance of 15,000 light-years it's the largest and brightest of 200 or so known globular clusters that roam the halo of our Milky Way galaxy. Though most star clusters consist of stars with the same age and composition, the enigmatic Omega Cen exhibits the presence of different stellar populations with a spread of ages and chemical abundances. In fact, Omega Cen may be the remnant core of a small galaxy merging with the Milky Way. With a yellowish hue, Omega Centauri's red giant stars are easy to pick out in this sharp telescopic view. A two-decade-long exploration of the dense star cluster with the Hubble Space Telescope has revealed evidence for a massive black hole near the center of Omega Centauri.
app.astrobin.com/i/7na4mz
ui.adsabs.harvard.edu/abs/2021
en.wikipedia.org/wiki/Globular
earthsky.org/clusters-nebulae-
esahubble.org/news/heic0809/

apod.nasa.gov/apod/ap250726.ht

About Intermediate-Mass Black Hole in Omega Centauri:
defcon.social/@grobi/114918173

Another week of progress in getting set up with the #fediverse! It's been a hell of a journey getting set up and some of my aspirations, like having all apps be able to be connected with external #SSO, won't happen (#pixelfed doesn't support it).

They still need more work and setup, but I'm also running #writefreely and #picsur. I have #cloudflare caching images and resources and responsiveness is looking pretty good despite the server being located in the EU and I'm in the US.

I've mis-mounted storage, done a ton of wipes, nearly got my federated local domains wrong. So many minor things. I still need to get actual admin stuff like captcha and sign in set up, but the infrastructure is there.

One of the things I'd like to do as well is to make a landing website with details on services provided, how to sign up, etc. It'd also be cool to get someone to do some iconography and make a mascot before it goes live.

Pending services:

  • piefed
  • #bookwyrm
  • maybe #Matrix. I've been using it on my own for a while, but even when switching from the main server to another implementation, I'm not sure it's ready.
  • a wiki

But so far, we have a 2 node #kubernetes #cluster with backups, replication & fault tolerance, caching, etc.

I've learned so much from doing this. Is is stuff I could repeat? dunno.

How to Deploy #PowerDNS #Cluster on #Ubuntu #VPS Servers This article provides a detailed guide for how to deploy PowerDNS cluster on Ubuntu VPS servers.
What is PowerDNS?
PowerDNS is an open-source #DNS (Domain Name System) server software that provides both authoritative and recursive DNS services. It’s widely used by ISPs, hosting providers, and enterprises due to its performance, scalability, and flexibility.
Key Features of PowerDNS: ...
Continued 👉 blog.radwebhosting.com/how-to- #installguide

How to Deploy PowerDNS Cluster on Ubuntu VPS Servers
RadWeb, LLC · How To Deploy PowerDNS Cluster On Ubuntu VPS Servers - VPS Hosting Blog | Dedicated Servers | Reseller HostingThis article provides a detailed guide for how to deploy PowerDNS cluster on Ubuntu VPS servers.

Vor 50 Jahren erschien #Zuckerzeit, das 3. Album des Elektronik-Duos #Cluster. Dieter Moebius & Hans-Joachim Roedelius nahmen 1974 getrennt voneinander je 5 Stücke auf. Roedelius' Tracks gelten als hellere "weiße Zuckerwürfel", Moebius' als dunklere "braune". Rothers Einfluss prägte den melodischeren Sound. Trotz ausbleibender Erfolge zählt das Album neben Werken von Kraftwerk und Tangerine Dream zu den Meilensteinen elektronischer Musik
👇
instagram.com/p/DMZl4gKomII/?i

How to Deploy #PowerDNS #Cluster on #Ubuntu #VPS Servers This article provides a detailed guide for how to deploy PowerDNS cluster on Ubuntu VPS servers.
What is PowerDNS?
PowerDNS is an open-source #DNS (Domain Name System) server software that provides both authoritative and recursive DNS services. It’s widely used by ISPs, hosting providers, and enterprises due to its performance, scalability, and flexibility.
Key Features of PowerDNS: ...
Continued 👉 blog.radwebhosting.com/how-to- #installguide

How to Deploy PowerDNS Cluster on Ubuntu VPS Servers
RadWeb, LLC · How To Deploy PowerDNS Cluster On Ubuntu VPS Servers - VPS Hosting Blog | Dedicated Servers | Reseller HostingThis article provides a detailed guide for how to deploy PowerDNS cluster on Ubuntu VPS servers.
Replied in thread

[...]
The stars in stellar associations are so spread out that they defy the image of a "cluster." Visually, the stars in these clusters might not look bound together at all. This is because, while the stars in stellar associations formed together and continue to move together through space, they have become gravitationally unbound. As a result, stellar associations are the least stable variety of star cluster. However, many of the brightest stars in constellations like Scorpius, Lupus, Centaurus, and Crux as well as the bright star Antares are all a part of a stellar association located about 400 light-years away.

Because they are not as obvious as their counterparts, stellar associations can be hard to spot. But scientists can still determine if stars are part of the same cluster or have common origins based on key factors like the stars’ age, movement, and sometimes even their chemical composition.

* Text excerpt from science.nasa.gov/universe/star

CREDIT

* Chelsea Gohd
NASA Universe Web Team

Please see ALT-Text for more information
(image below)

Continued thread

Stellar Associations

While globular and open clusters are generally referred to as the two main types of star clusters, there is a third variety of stellar groupings, called stellar associations, which are the most dispersed of the bunch. In fact, the vast majority of stars are born as members of a stellar association before they move apart.

In the Milky Way, the highest concentration of stellar associations is in the galaxy's spiral arms. Stellar associations are very loose clusters of 10 to upwards of 10,000 stars. While they might hold fewer stars than other types of clusters, because the stars are so spread out, stellar associations can be very large, averaging 700 light-years across.

Stellar associations are categorized based on the types of stars they contain. OB associations are made up of O and B-type stars that are young and massive (B-type stars are typically 2 to 15 times more massive than the Sun and O-type stars are usually 15 to 90 times as massive); R associations have young, bright stars with a medium mass between 3 to 10 times the mass of the Sun; and T associations contain mostly T Tauri stars that are fairly cool, young stars with low mass similar to the mass of our Sun.
[...]
Please see the reply for more Information about Stellar Associations

* Text excerpt from science.nasa.gov/universe/star

CREDIT

* Chelsea Gohd
NASA Universe Web Team

Please see ALT-Text for more information about NGC 206
(image below)

Continued thread

Open Clusters

Smaller than globular clusters, open clusters are more loosely bound groups that typically contain anywhere from tens to thousands of stars. Open star clusters have a core that typically measures a few light-years across that is surrounded by a corona, or the outermost part of a star’s atmosphere, that can stretch about tens of light-years out from the center.

Found in irregular galaxies and spiral galaxies like the Milky Way, open clusters contain both old and young stars and are generally much younger than globular clusters – typically they are less than a billion years old. Stars in open clusters are also more spread out, so these clusters are not very stable and the stars have a tendency to disperse after a few million years.

More plentiful in our galaxy than globular clusters, there are thousands of open clusters in the Milky Way, though it's thought that there could be many, many more. In the Milky Way, these clusters can be spotted in our galaxy's disk, both in and between its spiral arms.

* Text excerpt from science.nasa.gov/universe/star

CREDIT

* Chelsea Gohd
NASA Universe Web Team

Please see ALT-Text for more information about Messier 2 (image below)

Continued thread

Globular Star Clusters

Ancient and giant, globular star clusters are stellar "dinosaurs" scattered throughout the universe. They can survive for billions of years, holding some of the oldest stars in the universe.

Globular star clusters contain anywhere from tens of thousands to millions of stars, packed tightly together in dense clumps ranging from 50 to 450 light-years across, and they can be found throughout the halo, or outer regions, of our own Milky Way galaxy. These stars formed within massive clouds of gas anywhere from about 8 to 13 billion years ago. Once formed, these roughly spherical star clusters were left without gas and dust to feed new star formation. There is, however, some evidence that some globular clusters can produce multiple generations of stars early in the cluster’s life.

Globular star clusters are associated with all types of galaxies. The Milky Way holds about 150 known globular clusters, many of which are in retrograde orbits, meaning they are orbiting the center of the galaxy in the opposite direction of most of the objects in the Milky Way. This indicates that our galaxy could have captured these clusters during an interaction with another galaxy. These clusters are born so dense and massive that they can remain a cluster even after being pulled apart by gravity over time.

Because they contain so many stars, globular clusters are often the most visibly obvious clusters. Sky watchers can see many of them with the unaided eye. The largest and brightest globular cluster in the Milky Way galaxy, Omega Centauri (NGC 5139), is one of the clusters visible without a telescope.

"Due to their strong compression of mass, they can also be used for gravitational lensing. defcon.social/@grobi/114653568"

* Text excerpt from science.nasa.gov/universe/star

CREDIT
* Chelsea Gohd
NASA Universe Web Team

Please see ALT-Text for more information about Messier 2 (image below)

TOPIC> Star Clusters

2025 July 19

Messier 6
* Image Credit & Copyright: Xinran Li
app.astrobin.com/u/Flying_Dutc

Explanation:
The sixth object in Charles Messier's famous catalog of things which are not comets, Messier 6 is a galactic or open star cluster. A gathering of 100 stars or so, all around 100 million years young, M6 lies some 1,600 light-years away toward the central Milky Way in the constellation Scorpius. Also cataloged as NGC 6405, the pretty star cluster's outline suggests its popular moniker, the Butterfly Cluster. Surrounded by diffuse reddish emission from the region's hydrogen gas the cluster's mostly hot and therefore blue stars are near the center of this colorful cosmic snapshot. But the brightest cluster member is a cool K-type giant star. Designated BM Scorpii it shines with a yellow-orange hue, seen near the end of one of the butterfly's antennae. This telescopic field of view spans nearly 2 Full Moons on the sky. That's 25 light-years at the estimated distance of Messier 6.
app.astrobin.com/i/7472xp
en.wikipedia.org/wiki/BM_Scorp
en.wikipedia.org/wiki/Butterfl
science.nasa.gov/image-detail/
earthsky.org/clusters-nebulae-

science.nasa.gov/people/explor

apod.nasa.gov/apod/ap250719.ht

A fully managed Kubernetes engine hosted in Swiss data centres? Yes, that's possible – thanks to our NKE product. 💯 So the data residency stays in Switzerland and you get integrated identity management for improved security. 🔐 Would you like to migrate away from Google or not have to worry about all the processes in the background? Then visit nine.ch/products/kubernetes/ today and opt for NKE, our managed Kubernetes solution. 👈 #kubernetes #managed #cluster #nke #k8s #data #switzerland #nine

How to Deploy #PowerDNS #Cluster on #Ubuntu #VPS Servers This article provides a detailed guide for how to deploy PowerDNS cluster on Ubuntu VPS servers.
What is PowerDNS?
PowerDNS is an open-source #DNS (Domain Name System) server software that provides both authoritative and recursive DNS services. It’s widely used by ISPs, hosting providers, and enterprises due to its performance, scalability, and flexibility.
Key Features of PowerDNS: ...
Continued 👉 blog.radwebhosting.com/how-to- #installguide

How to Deploy PowerDNS Cluster on Ubuntu VPS Servers
RadWeb, LLC · How To Deploy PowerDNS Cluster On Ubuntu VPS Servers - VPS Hosting Blog | Dedicated Servers | Reseller HostingThis article provides a detailed guide for how to deploy PowerDNS cluster on Ubuntu VPS servers.

How to Deploy #PowerDNS #Cluster on #Ubuntu #VPS Servers This article provides a detailed guide for how to deploy PowerDNS cluster on Ubuntu VPS servers.
What is PowerDNS?
PowerDNS is an open-source #DNS (Domain Name System) server software that provides both authoritative and recursive DNS services. It’s widely used by ISPs, hosting providers, and enterprises due to its performance, scalability, and flexibility.
Key Features of PowerDNS: ...
Continued 👉 blog.radwebhosting.com/how-to- #installguide

How to Deploy PowerDNS Cluster on Ubuntu VPS Servers
RadWeb, LLC · How To Deploy PowerDNS Cluster On Ubuntu VPS Servers - VPS Hosting Blog | Dedicated Servers | Reseller HostingThis article provides a detailed guide for how to deploy PowerDNS cluster on Ubuntu VPS servers.

Da wir immer mehr #Container Zeug in unseren #Logs haben, suche ich was besseres als #Graylog. Pro RZ haben wir rund 110GB/Tag und das wachsend. Unser 5 Node #ELK #Cluster frisst uns die Haare vom Kopf. Die Logs müssen in der Regel 1y aufbewahrt werden.

Bin auf #grafana #loki gestoßen was wirklich nett klingt, aber nach dem Lesen

itnext.io/how-do-open-source-s

bin ich mir nicht mehr sicher. Wir haben tatsächlich nicht selten die Nadel im 1y Heuhaufen zu finden.