#stellarevolution — Public Fediverse posts

A Black Hole That Is Not Formed from Stellar Collapse  

# BlackHole #DCBH #DirectCollapseBlackHole #EarlyUniverse #Galaxy #JamesWebbSpaceTelescope #JWST #LittleRedDot #LRD #PBH #PrimordialBlackHole #StellarEvolution

https://zurl.co/wJChE

#DerStandard:
"
Die Erde wird wohl doch nicht von unserer Sonne verschlungen

Eine neue Studie rechnet vor, dass unsere Heimat das Ende der Sonne überleben könnte. Ein Trost ist das nicht, denn zu diesem Zeitpunkt ist die Erde schon lange eine tote Gesteinskugel
"
https://www.derstandard.at/story/3000000328519/die-erde-wird-wohl-doch-nicht-von-unserer-sonne-verschlungen

29.6.2026

#AsymptoticGiantBranch #Earth #Erde #Gezeitendissipation #Gravitation #RoterRiese #Sonne #Star #StellarEvolution #Stern #Sternentwicklung #Sun

#arXiv:
"The fate of Earth during the Sun’s giant phases: New constraints from ab initio tidal modelling and AGB mass loss"
"..need for improved constraints on .. late-stages of stellar evolut. .. .. considering observat. proxies for .. Sun during .. AGB phase, it is likely .. Earth will survive .. Sun's giant phases."
https://arxiv.org/abs/2606.19575

17.6.2026

#AsymptoticGiantBranch #Earth #Erde #Gezeitendissipation #Gravitation #RoterRiese #Sonne #Star #StellarEvolution #Stern #Sternentwicklung #Sun

Hubble suit la nébuleuse du Crabe sur 25 ans et révèle son expansion spectaculaire, fascinant les astronomes et passionnés du ciel. www.science-et-vie.com/ciel-et-espa... #Space #Science #Innovation #Astrophysics #StellarEvolution #CrabNebula #HubbleUpdates

Hubble révèle l’expansion de l...

Supernovae come in two types. Core-collapse supernovae result from massive stars exhausting fuel. Thermonuclear supernovae are triggered by white dwarfs accreting mass or merging. Both produce expanding SNRs that can leave neutron stars or black holes.

#Supernovae #StellarEvolution #NASA

⭐ The stars that guided ancient navigators are aging through cosmic epochs. Our Sun transforms across ten billion years, swelling from a G-type main-sequence star to a red giant, forging helium now, and later carbon and oxygen in its core.

✍️ Explore stellar aging 🌟: https://TPC8.short.gy/9fmc40pU

🌠 Every atom remembers its stellar birth

#Astronomy #StellarEvolution #CosmicTime #Science #Space #Cosmology #Astrophysics #TPC8

The Star That Jumped Through Time 🌟⏳

Imagine finding a modern artifact inside an ancient fossil—that is the level of scientific paradox recently discovered by the Gaia telescope. Astronomers have spotted a red giant star orbiting the black hole Gaia BH2 that simply shouldn't exist as it currently does.
#Astronomy #NASA #SpaceDiscovery #GaiaTelescope #Astrophysics #ScienceNews #UniverseMystery #StellarEvolution #Cosmology #Physics #BlackHole

https://www.thesciencechannel.org/this-star-belongs-to-an-older-universe-what-is-it-doing-here/

🌌 Some cosmic objects exist at the threshold. Too massive for planetary peace, too small for stellar fire, they drift through ages in slow surrender to darkness.

✍️ Discover these failed stars between worlds 🔭: https://TPC8.short.gy/OdqADo74

✨ Where physics draws boundaries, nature paints twilight

#BrownDwarfs #Astrophysics #CosmicThresholds #Physics #StellarEvolution #Astronomy #Space #TPC8

⭐ Every star that lights the night once faced an impossible challenge: transforming from a cold, dark cloud into nuclear fire. The universe demands precise conditions most clouds never achieve.

✍️ Discover what separates failed attempts from blazing success 🌟: https://TPC8.short.gy/WeAxAQoa

🌌 In cosmic depths, gravity whispers secrets of stellar birth

#Astrophysics #StarFormation #StellarEvolution #Astronomy #SciComm #Physics #Space #TPC8

The Start of a Supernova

Stars about eight times more massive than our sun end their lives in supernovas, incredible explosions that rip the star apart. The earliest stages of this explosion are something we’ve never observed firsthand, until now. A new study reports observations of the supernova explosion SN 2024ggi, detected here on Earth on 10 April 2024. Only 26 hours later, researchers pointed the Very Large Telescope at it, capture data that revealed its oblong shape as the initial explosion reached the star’s surface.

What you see above and below are not the actual supernova. They are an artist’s conception of the event, based on the researchers’ observation data. That data is enough to rule out several existing supernova models and will no doubt guide new models of star death going forward. (Image credit: ESO/L. Calçada; research credit: Y. Yang et al.; via Gizmodo)

https://www.youtube.com/watch?v=KPbOu83mKWc

#astrophysics #fluidDynamics #instability #physics #science #stellarEvolution #supernova

Hot new #JWST image just dropped.

This is WR 70–16, a triple-star system better known as "Apep" after the mortal enemy of the sun god Ra in Egyptian mythology. The main pair of stars in the system is a rare binary composed of two Wolf–Rayet stars. These are evolved, massive stars that have completely lost their outer hydrogen atmospheres and are fusing helium (or heavier elements) in their cores. In time, these objects are thought to turn into supernovae. A third, hot supergiant star orbits the binary Wolf-Rayet stars with an orbital period of at least 10,000 years.

Wolf-Rayet stats are cosmic dust-making factories. A vast complex of cosmic dust shaped by furious stellar winds surrounds the system. The orbiting star/dust sources produces a pinwheel effect near the center of the image.

It's a highly dynamic system. According to NASA, "When the two Wolf-Rayet stars approach and pass one another, their strong stellar winds collide and mix, forming and casting out heaps of carbon-rich dust for a quarter century at a time." The dust produced by systems like this goes on to contribute to the formation of the next generation of both stars and planets.

Read more about this image on: https://science.nasa.gov/missions/webb/webb-first-to-show-4-dust-shells-spiraling-apep-limits-long-orbit/

#Astronomy #Apep #Stars #StellarEvolution

NASA’s TESS Spacecraft Triples Size of Pleiades Star Cluster https://science.nasa.gov/missions/tess/nasas-tess-spacecraft-triples-size-of-pleiades-star-cluster/ #NASA #Astrophysics #GalaxiesStarsBlackHolesResearch #GoddardSpaceFlightCenter #StarClusters #Stars #StellarEvolution #TESSTransitingExoplanetSurveySatellite #TheUniverse

Formation and evolution of the Solar System (Planetary science 🪐)

There is evidence that the formation of the Solar System began about 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, ...

https://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System

#FormationAndEvolutionOfTheSolarSystem #Cosmogony #SolarSystem #PlanetaryScience #StellarAstronomy #StellarEvolution

Veil Nebula

These glowing wisps are the visible remains of a star that went supernova about 7,000 years ago. Today the supernova remnant is known as the Veil Nebula and is visible only through telescopes. In the image, red marks hydrogen gas and blue marks oxygen. First carried by shock waves, these remains of a former star now serve as seed material for other stars and planetary systems to form. (Image credit: A. Alharbi; via APOD)

#astrophysics #fluidDynamics #physics #science #shockwave #stellarEvolution #supernova #turbulence

Astronomers Spot Companion Star in Orbit Around Iconic Star Betelgeuse, Confirming Suspicions

In 2024, astronomers surmised that Betelgeuse might have a stellar “buddy.” If this hypothetical companion existed, it would…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Science #Astronomy #Stellarastronomy #Stellarevolution
https://www.newsbeep.com/us/27856/

Glimpses of Coronal Rain

Despite its incredible heat, our sun‘s corona is so faint compared to the rest of the star that we can rarely make it out except during a total solar eclipse. But a new adaptive optic technique has given us coronal images with unprecedented detail.

These images come from the 1.6-meter Goode Solar Telescope at Big Bear Solar Observatory, and they required some 2,200 adjustments to the instrument’s mirror every second to counter atmospheric distortions that would otherwise blur the images. With the new technique, the team was able to sharpen their resolution from 1,000 kilometers all the way down to 63 kilometers, revealing heretofore unseen details of plasma from solar prominences dancing in the sun’s magnetic field and cooling plasma falling as coronal rain.

The team hope to upgrade the 4-meter Daniel K. Inouye Solar Telescope with the technology next, which will enable even finer imagery. (Image credit: Schmidt et al./NJIT/NSO/AURA/NSF; research credit: D. Schmidt et al.; via Gizmodo)

#flowVisualization #fluidDynamics #magneticField #magnetohydrodynamics #physics #plasma #science #solarDynamics #stellarEvolution