Arsen Dzℏanoev

Theoretical Physicist

[Arsen Dzℏanoev @dzhanoev]

Great News: Today our new @PhysRevB paper on the Surface Tension of Fluids near Critical Temperature is published online !!! https://t.co/t8CGlS99fJ

[Nereide @Nereide]

1/5
A team, led by researchers at #MPE and the Paris Observatory/PSL, detected S301, the closest star around Sgr A*, the BH at the heart of our Galaxy. 🔭

It orbits in 8.7 years and its peak velocity reaches about 25,000 km/s, so being faster than any known star in the #MilkyWay.

#cosmology #Universe

[Susan J Hodgetts (Sue) @hodgetts_susan]

#thicktrunktuesday

I think there ought to be a big old tree right there. And let's give him a friend. Everybody needs a friend. 🌳🦌

~ #BobRoss (1942-1995)

📷Balnagown Estate, Kildary, Ross-shire, Scottish Highlands
.

[Nereide @Nereide]

1/9
#Gluons are the mediators of the strong force: they hold together the #quarks inside protons and neutrons.

Unlike photons, however, they can stick together.

For nearly 50 years, researchers have been searching for a particle like this: a "glueball." ⚛️ 🧪

#physics #glueball #science

[Nereide @Nereide]

A year ago, I reported the discovery of MoM-z14, the most distant galaxy confirmed spectroscopically, a result of the JWST "Mirage or Miracle" (MoM) program led by Rohan Naidu and collaborators.
(https://t.co/hXHcbyigeq)
The same team and the same survey have just published another important result from the same program in Nature (12 August 2026): MoM-BH*-1.

Contrary to some recent claims, this is not something completely new that the cosmos has never shown us before — similar objects (the so-called little red dots) have been observed for years — nor is it a star with a black hole inside in the literal sense.

The paper - 'A gas-enshrouded and gas-reddened black hole at cosmic dawn'- proposes a model in which a supermassive black hole (about 10⁶–10⁷ solar masses) is surrounded by an envelope of extremely dense and turbulent gas, approximately the size of the Solar System.

This envelope of gas produces an exceptionally strong Balmer break (a sudden dip or jump in the continuous spectrum of light) and makes the object appear red and "stellar," even though the energy comes from accretion onto the black hole and not from nuclear fusion.

It is a very interesting candidate (called a "black-hole star" or BH*) that could represent a super-Eddington growth phase of early supermassive black holes and help explain some of the "little red dots" observed by the #JWST.

(Super-Eddington growth phase is a feeding process where a BH or neutron star swallows matter faster than the standard Eddington limit, a natural limit to the normal luminosity of stars).

However, this remains a modeling interpretation: the picture is still evolving, as Naidu himself emphasizes.

Two complementary results from the same MoM program:

- MoM-z14 (2025) → a bright and compact galaxy just 280 million years after the Big Bang
- MoM-BH*-1 (2026) → a possible early stage of a black hole surrounded by dense gas

Both force us to reconsider models of the formation of the first cosmic structures, but with due scientific caution.

- https://t.co/m0wB4du2De

- https://t.co/6FNlCtfOKo

[Rich Rautenstrauch @RichRautenstra1]

Enterprise Car Show
Picked out my favorites. Always love the 1931 Cord. The 55 yellow Chevy was beautiful, and I loved the Chevy 502 big block motor in the Ratrod. The Chevelle is a friend's car, he drove it in high school. So fun to still see it around.🚗🚗🚗

[Rich Rautenstrauch @RichRautenstra1]

Let me tell you about my best friend. 🐶🐶
River (the big dog) and Meadow at Marr Pond.💦

[Massimo @Rainmaker1973]

Josie, the legendary lioness from Addo Elephant National Park in South Afric, who defied the typical "death sentence" of blindness for predators, surviving for roughly five years without sight.

Her two daughters, Dawn and Duffy, acted as her "eyes". They guided her through the bush with soft contact calls, protected her from scavengers, and ensured she fed first after hunts.

Even more striking, she lived to approximately 17 years old, significantly exceeding the average wild lion lifespan of 14–15 years.

[Nereide @Nereide]

1/4
The peak of the #Perseids is expected to be on the night of August 12 through the morning of August 13.🔭

The best observation conditions will be in the hours after midnight until dawn, when the radiant in Perseus is highest.

https://t.co/gKvTQb6tdb

#Astronomy

[Nereide @Nereide]

1/7
On 5 August 2026, around 06:35 UTC, a #Falcon9 upper stage (2025-010D) will strike the #Moon. 🔭

It is not an asteroid: it is known hardware that has been in orbit since January 2025, with a trajectory calculated to within a few seconds and kilometres.

#Space #MoonImpact #SpaceDebris

[Nereide @Nereide]

1/6
A team led by Kevin Hoy has published evidence in Nature for a planetary-mass object orbiting the brown dwarf CD-35 2722 B.

It's not yet a definitive confirmation, but the authors describe it as strong evidence & the first plausible detection of this kind.

#browndwarf #science

[Susan J Hodgetts (Sue) @hodgetts_susan]

Still, obviously, one can't be sensible all the time.

'The Stranger' (L'Étranger ) : #AlbertCamus (1913-1960)

📷 Jenna Martin/ flickr

[Rich Rautenstrauch @RichRautenstra1]

I'll be out in the backyard. 🔨🪚

[Nereide @Nereide]

1/7
Imagine having a detailed map of the youngest & hottest stars in the #MilkyWay — the ones that form & die within just a few million years.

A research team (Quintana et al.) has recently completed exactly that using Gaia DR3 data, reaching out to 2 kpc (~ 6,520 ly) from the Sun.🔭

#Astronomy

[Rich Rautenstrauch @RichRautenstra1]

Lot of things flying around here yesterday.😄

[Susan J Hodgetts (Sue) @hodgetts_susan]

#ShakespeareSunday
.
When we have matched our rackets to
these balls,
We will in France, by God’s grace, play a set..

Henry V, Act I, scene 2
.

~ View of short palm game, Paris, 1750-1850: Bibliothèque nationale de France.

[Nereide @Nereide]

1/6
This image lets us observe light emitted by a dying star about 1500 years ago.

Gemini North🔭, on Maunakea in Hawai‘i, captured NGC 1514 — the Crystal Ball Nebula — in detail: a shell of gas ejected during the final stages of a star’s life.

https://t.co/2FKLh0fnet

#astronomy #MilkyWay

[Arnold Schwarzenegger @Schwarzenegger]

Happy Independence Day!

There’s a story from the end of the Revolutionary War I want to tell as we celebrate America’s 250th Birthday, and it’s one everyone in the world can learn from.

George Washington, at that moment, after commanding the American forces to victory, was the most powerful man in the new country. Many people talked about making him King of America.

Across the ocean, King George was sitting with an American painter, and asked what he thought Washington would do now that the war was ending. The painter said he believed he would go back to his farm.

The King said, “If he does that, he will be the greatest man in the world.”

As the war officially ended, Washington came to speak to Congress and said, “Having now finished the work assigned me, I retire from the great theater of Action.” He returned his commission they’d given him in 1775 - after more than 8 years of leading the Americans to victory without pay, and he was home at Mount Vernon for Christmas.

Of course, he was elected as our first President a few years later, and after two terms, showed the same selflessness again when he willingly gave up his power and went back to Mount Vernon again.

That’s true greatness. He had all the power in the world. But power, alone, does not make you great.

Washington’s greatness came from being a true servant - to a cause much bigger than himself. His greatness was his complete lack of selfishness.

The whole story of American Independence is a story of selflessness. It’s a story of people who set their self-interest aside and worked for each other.

We’ve all heard the line about “We must all hang together, or, most assuredly, we shall all hang separately.”

Apparently, Ben Franklin might have actually never said that.

But that’s fine, because the same mentality is right there in the last line of the Declaration of Independence, published on this day 250 years ago:

“And for the support of this Declaration, with a firm reliance on the protection of divine Providence, we mutually pledge to each other our Lives, our Fortunes and our sacred Honor.”

We mutually pledge to each other.

No one was in this alone. No one was in it for themselves. This was a group of people with different backgrounds who were in it for each other.

Today is a reminder: greatness comes from what we do for each other, never what we do for ourselves.

That’s a lesson that applies no matter what country you call home.

It’s a lesson that doesn’t require any law passed by a politician, because, let’s be honest, if you’re waiting for selfless politicians, I really hope you are not holding your breath.

All of us have the power to be there for the people around us. For our families and friends. For our neighbors. For everyone.

All of us can reach for greatness.

It’s as simple as looking beyond yourself, seeing past the mirror, picking your eyes up from your phone, and pledging to be there for each other.

Happy Fourth. May you all find your own version of greatness today by lifting each other up.

Lift up your neighborhood. Lift up America. Lift up the World.

[Neil deGrasse Tyson @neiltyson]

July 4, 2026
Happy 250th Birthday, America.

[Deck of the Intrepid Sea, Air, & Space Museum, NYC July 4, 2012]

[Christopher Nolan Archives @NolanAnalyst]

19 Days until Christopher Nolan’s ‘THE ODYSSEY’

[Massimo @Rainmaker1973]

Peacock feathers create color with photonic crystal nanostructures, not pigment.

This is what they look like under a microscope.