SevalT

Reasercher at @iugalactics,
Astrophysicist

[SevalT @sevollyum]

I always feel happy,you know why?Because I don't expect anything from anyone,expectations always hurt..life is short,so love your life...

[SevalT @sevollyum]

@uzayvebilimtr Nükleer füzyon sadece büyük kütleli yıldızlara özel bir şey değildir. Küçük-büyük kütle farketmeksizin yıldızların temel enerji üretimi nükleer füzyon ile gerçekleşir. Büyük kütleli yıldızlarda bu süreç baskın olarak CNO döngüsü ile p-p zinciri ile meydana gelir. 👍🏻

[SevalT @sevollyum]

@Sertac_Oztrk Hocam selam, Fotonlardan sayılara: astrofizikte yıldız ışığının nasıl bilgiye çevrildiği üzerine bir yazı fena olmazdı açıkçası 🤟🏻✨️ özellikle ccd dedekötörlerdeki kuantum etkisine de değinebileceğiniz yine çok zengin yazı çıkabilir diye düşünüyorum.

[SevalT @sevollyum]

@AJamesMcCarthy Heart nebula 🤍✨️, maybe you should share heart and soul nebula altogether

[SevalT @sevollyum]

@Moon4pics 🔭

[Shining Science @ShiningScience]

🌌 The Mystery of Interstellar Visitor #3IATLAS

Something strange is passing through our solar system right now — and scientists can’t quite explain it.

It’s called 3I/ATLAS, only the third known interstellar object ever discovered after ‘Oumuamua (2017) and Borisov (2019). But unlike any comet we’ve seen before, 3I/ATLAS refuses to play by the rules.

🧊 First, its chemistry is bizarre.
Data from the James Webb Space Telescope revealed that its coma — the glowing cloud around it — is dominated by carbon dioxide, not water vapour like normal comets. The CO₂-to-H₂O ratio is about eight times higher than usual. That’s a huge red flag. It means this object formed in a very different environment — perhaps somewhere far colder and older than our solar system ever was.

☄️ Then there’s its behaviour.
Astronomers spotted signs of water activity (OH gas) when 3I/ATLAS was still more than 3.5 times farther from the Sun than Earth — a distance where normal comets stay frozen solid That early activity hints that it contains super-volatile ices or that sunlight somehow triggers it in unusual ways.

🔭 Its light is also strange.
When scientists studied how sunlight scatters off its dust, 3I/ATLAS showed an extreme negative polarisation pattern — meaning the light behaves differently than it does for any comet or asteroid we know. The particles around it seem unusually fine-grained or structured, perhaps coated in exotic ices that survived billions of years of cosmic radiation.

🌠 Even its tail seems to break physics.
Some images show a faint “anti-tail” — a stream of material apparently pointing toward the Sun, not away from it. That’s not supposed to happen. Normally, solar wind pushes dust and gas outward. Astronomers are still debating whether this is a perspective illusion or something truly unusual about the material leaving its surface.

💫 And here’s the kicker — it’s active but stable.
Despite releasing gas and dust, 3I/ATLAS shows almost no measurable non-gravitational acceleration. In other words, it’s venting material, but not being pushed off course like most comets. The only way that makes sense is if it’s incredibly massive — or if the jets of gas are firing so symmetrically that they perfectly balance out.

🪐 So what is it, really?
Some astronomers call it a comet. Others say it’s something else entirely — a frozen time capsule from the galaxy’s ancient past.

Studies by Matthew J. Hopkins et al. (Ōtautahi–Oxford model, arXiv:2507.05318) and Aster G. Taylor & Darryl Z. Seligman (arXiv:2507.08111) suggests 3I/ATLAS may come from the Milky Way’s thick disk — a region filled with stars more than 7 billion years old. If that’s true, this object could have been wandering through interstellar space for up to 10 billion years older than the Sun itself.

In other words, we might be watching a visitor from the time when galaxies were still forming.

🛸 It’s not just space debris — it’s a messenger from another era.
What secrets are frozen inside it? What does it remember about the birth of worlds long before ours?

No one knows yet. But for now, 3I/ATLAS drifts quietly through the dark — a silent witness from the deep past, leaving scientists wondering if we’ve just glimpsed one of the oldest objects ever to cross our path. 👁️

#3i_atlas #NASA #ESA #Space #Astronomy #ufotwitter #ufoX

[Astrophysics of Galaxies Papers @BCRX]

An In-depth Analysis of Photometric and Kinematic Characteristics of SAI 16, SAI 81 and SAI 86 Open Clusters Utilizing Gaia DR3. https://t.co/e4If5dAJfT

[Astrophysics of Galaxies Papers @BCRX]

Enhancing SED-Based Astrometric, Photometric, and Kinematic Studies of SAI 72 and SAI 75 Using Gaia DR3. https://t.co/3C0TMVfIEq

[SevalT @sevollyum]

@ArxenX @tadonafilsitrat E = 10^(1.5 × ΔM) formulunde,
Burada siddetlerin farki ΔM =7.2-6.2=1.0 dolayisiyla 10^1.5=31.6 katlik bir fark yapar

[SevalT @sevollyum]

Dalga geçiyorlar sanırım. Çekmeyen interneti, dakikayi tanimlasan ne olur

[SevalT @sevollyum]

@raandromedea Muse konserinden daha çok istediğim bir şey varsa o da herkesin çok mutlu olduğu, acıların geçtiği, huzurun, adaletin hüküm sürdügü yarınlardır. Ben onları bir yerde yakalarım illaki ;) 🤍🤍

[Astrophysics of Galaxies Papers @BCRX]

Comprehensive Analysis of Middle-Aged Open Cluster NGC 6793 in Vulpecula via Gaia DR3 Data. https://t.co/DBlwAeG6X0

[Un1v3rs0 Z3r0 @Un1v3rs0Z3r0]

Comprehensive Analysis of Middle-Aged Open Cluster NGC 6793 in Vulpecula via Gaia DR3 Data https://t.co/LvLFtSsqN7

[SevalT @sevollyum]

📌

[Tarihte O An @TarihteOan]

“Milletin bağımsızlığını, yine milletin azim ve kararı kurtaracaktır.”

💬Gazi Mustafa Kemal Atatürk

[SevalT @sevollyum]

@Raskolnikovsair

[SevalT @sevollyum]

Hello world! #cs50
@davidjmalan 🪐
@brianyu28 ✨️

[SevalT @sevollyum]

@mknewstr Büyüleyici kısmi 3 saniye sonra koridor boyunca bütün sınıfların kapısının gol çığlıkları ile açılmasıydi. Herkesin tek yürek maça kitlenmesi... asla hatrimdan cikmiyor. Harika bir atmosferdi ✨️🥹

[SevalT @sevollyum]

@mknewstr Benim en unutulmaz anım lise zamanimdaydi. Gs-juventus CL maçi kar yagisi yüzünden ertelenir. Ertesi gün öğle saati bizde dersteyiz. Ders fizik, en ön sira, kuakta kulaklık, raydo açık. ilk gol olduğunda kendimi kaybettim ve gol diye bağirdim. Hoca şok. Belkide o anın en +++

[Galactic Structure Research Group @iugalactics]

Galaktik Yapı Çalışma Grubu üyeleri, CN Lyn yıldız sisteminin oluşumuna dair çığır açan keşiflerini Anadolu Ajansı’na anlattı! ✨

Bu çalışma, yıldız sistemlerinin evrimini anlamamıza yeni bir perspektif kazandırıyor. Detaylar için habere göz atın!