Researchers have found evidence of a subgiant star eating one of its planets — a cosmic drama that may preview the eventual fate of Earth as our sun ages. #exoplanets #stellarevolution #astronomydiscovery

https://www.universetoday.com/articles/astronomers-find-stellar-evidence-of-an-engulfed-planet?utm_source=flipboard&utm_medium=activitypub

Posted into FLIPBOARD EXCHANGE FEED 🗞️ @flipboard-exchange-feed-Econopass

Astronomers Find Stellar Evidence of an Engulfed Planet

A team of 14 researchers from the United States and Chile have found evidence of a subgiant star eating one of its planets. The star, called TOI-5882, was already known to astronomers because of its massive companion, a brown dwarf called TOI-5882 b. The companion may well have helped kick a planet onto a spiraling journey into the star.

Universe Today

#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

The fate of Earth during the Sun's giant phases: New constraints from ab initio tidal modelling and AGB mass loss

The long-term evolution of planetary systems around solar-type stars is governed by the interplay between stellar expansion, tidal interactions, and mass loss during the red giant branch (RGB) and asymptotic giant branch (AGB) phases. However, tidal dissipation efficiencies and AGB mass-loss rates both remain poorly constrained, leading to significant uncertainty in predicting the fate of planetary systems, in particular, that of the Earth orbiting the ageing Sun. We reassess the survival of the Earth and the inner Solar System planets during the entire evolution of the Sun, focusing on the impact of updated tidal dissipation prescriptions and varying AGB mass-loss rates. We modelled the orbital evolution of the Earth using stellar evolution tracks for a solar-mass star. We compared these results with outcomes obtained using previously published and commonly adopted tidal prescriptions, and we explored a range of AGB mass-loss rates. We find that the predicted fate of the Earth is highly sensitive to the tidal model and the assumed mass-loss rate. Based on updated tidal dissipation prescriptions, Earth survives the RGB and AGB phases of the Sun. In contrast, the use of earlier tidal dissipation prescriptions leads to engulfment during the AGB phase. Furthermore, low AGB mass-loss rates result in engulfment, and vice versa. Using the observed mass-loss rates of the AGB star L2 Pup as a proxy for the Sun's future AGB mass-loss rate results in the survival of the Earth during the AGB phase when combined with our tidal dissipation evaluation. Given the current observational uncertainties in AGB mass-loss rates, the ultimate fate of the Earth remains uncertain, highlighting the need for improved constraints on the late-stages of stellar evolution. However, considering observational proxies for the Sun during the AGB phase, it is likely that the Earth will survive the Sun's giant phases.

arXiv.org
New in the #VirtualObservatory: “MESA Grid: Binary Evolution (M1=6.0, M2=4.0, Z=0.02)” by Vaidman, N. L. et al.
https://dachs.fai.kz/mesa_bin_6_4_0.02/q/q/info
#Accretion #HertzsprungRussellDiagram #StellarEvolutionaryModels #StellarEvolution
Information on Service 'MESA Grid: Binary Evolution (M1=6.0, M2=4.0, Z=0.02)'

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...
Hubble révèle l’expansion de la nébuleuse du Crabe sur 25 ans

Découvrez pourquoi la nébuleuse du Crabe continue de s'étendre presque mille ans après la supernova qui lui a donné naissance

Science et vie
Hubble suit la nébuleuse du Crabe sur 25 ans et révèle son expansion spectaculaire, fascinant les astronomes et passionnés du ciel.
https://www.science-et-vie.com/ciel-et-espace/hubble-revele-lexpansion-de-la-nebuleuse-du-crabe-sur-25-ans-232855.html
#Space #Science #Innovation #Astrophysics #StellarEvolution #CrabNebula #HubbleUpdates
Hubble révèle l’expansion de la nébuleuse du Crabe sur 25 ans

Découvrez pourquoi la nébuleuse du Crabe continue de s'étendre presque mille ans après la supernova qui lui a donné naissance

Science et vie
Discover how the giant star WOH G64, one of the largest known, transformed in 2014 and might be heading for a supernova. Learn about its rare shift from red supergiant to yellow hypergiant. https://english.mathrubhumi.com/technology/science/massive-star-woh-g64-supernova-transformation-eegzllpd?utm_source=dlvr.it&utm_medium=mastodon #WOHG64 #Supernova #Astronomy #SpaceScience #StellarEvolution

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 Cosmic Clock: How Stars Age Through Billions of Years ⏰

How do stars age? Explore stellar evolution, the helium flash, red giants, and what happens when stars die. Plus our Sun's 10-billion-year journey.

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/

This Star Belongs to an Older Universe. What is It Doing Here?

Astronomers Have Spotted a Star That Seems to Have Jumped Time. Imagine finding a dinosaur fossil embedded with a piece[...]

The Science Channel

🌌 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

Brown Dwarfs: Failed Stars at the Universe's Threshold 🌟

Discover brown dwarfs: failed stars between planets & suns. Physics of 13-84 Jupiter masses, eternal cooling, and cosmic significance explained.