#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.
RE: https://fnordon.de/@mspro/116778707854748857
Der #Stern macht sich zum Anwalt der Abrisskoalition?! Aufweichen der Arbeitszeitregeln ist kein Fortschritt, DAS ist Rückwärtsgewandt! Das ist Propaganda, kein #Journalismus!
RE: https://norden.social/@wackJackle/116778624644152627
Der #Stern macht sich zum Anwalt der Abrisskoalition?! Aufweichen der Arbeitszeitregeln ist kein Fortschritt, DAS ist Rückwärtsgewandt! Das ist Propaganda, kein #Journalismus!
#SciAM:
"
JWST catches cosmic imposters spoofing faraway galaxies
"
"The James Webb Space Telescope has found nearby brown dwarfs masquerading as far-distant galaxies. The discovery reinforces how, in astronomy, what you see isn’t always what you get"
https://www.scientificamerican.com/article/jwst-catches-cosmic-imposters-spoofing-faraway-galaxies/
19.6.2026
#Astronomie #astronomy #BraunerZwerg #BrownDwarf #BulletBD1 #BulletBD2 #JWST #RedDot #Stern #Weltraumteleskop
JWST catches cosmic imposters spoofing faraway galaxies
The James Webb Space Telescope has found nearby brown dwarfs masquerading as far-distant galaxies. The discovery reinforces how, in astronomy, what you see isn’t always what you get
#GoetheUniversität:
"
Urknall im Innern eines Sterns: Wie ein Gravastern entsteht
"
"Der Kollaps eines Sterns am Ende seiner Entwicklung könnte .. zu einem extrem kompakten Stern führen, einem sg. Gravastern, der von außen einem Schwarzen Loch ähnelt. Darauf weisen zwei theoretische Physiker der Goethe-Univ. hin. .."
https://www.uni-frankfurt.de/de/newsroom/meldungen/pressemitteilungen/2026/urknall-im-innern-eines-sterns-wie-ein-gravastern-entsteht
11.6.2026
#ART #Astrophysik #DunkleEnergie #FFM #Gravastern #NeuePhysik #Gravitation #Kollaps #Singularität #Stern #Sternentwicklung #TheoretischePhysik
Urknall im Innern eines Sterns: Wie ein Gravastern entsteht
<p>Der Kollaps eines Sterns am Ende seiner Entwicklung könnte statt zu einem Schwarzen Loch auch zu einem extrem kompakten Stern führen, einem sogenannten Gravastern, der von außen einem Schwarzen Loch ähnelt. Darauf weisen zwei theoretische Physiker der Goethe-Universität hin. </p>
Tonight is some Mahler with the Met Orchestra and Joyce DiDonato
#music #concert #CarnegieHall #Stern
And tonight is an evening of music from Final Fantasy celebrating Nobuo Uematsu
#music #concert #FinalFantasy #CarnegieHall #Stern
#Stern Zürn https://ift.tt/ZvV2qMp | posted by afasia | daily entries on contemporary art and architecture #afasiaarchzine #afasiaarq |
#architecture #arquitectura #design
MAISON IMHO . Riehen Stern Zürn Architekten . photos: © Markus Stern . + bau…
Dramaturg Jan Štern v rozhovoru pro podcast VINA od Vlny.cz popsal „cenzorní zásah“ České televize, když se diskutovalo
Tón: : mírně negativní
#česko #gdelt #štern #čt #střelba
https://www.parlamentnilisty.cz/arena/monitor/To-je-rana-Cenzura-v-CT-Co-nemel-divak-videt-o-strelbe-na-fakulte-791879
To je rána. Cenzura v ČT. Co neměl divák vidět o střelbě na fakultě?
Dramaturg Jan Štern v rozhovoru pro podcast VINA od Vlny.cz popsal „cenzorní zásah“ České televize, když se diskutovalo o natočení dokumentu o zásahu policie během střelby na Filosofické fakultě Univerzity Karlovy. Sám měl k dispozici informace o „skandálním selhání policie“.
RTN
The REAL fradie 💚☕💻🤎🏳️🌈
AndyHat
Bapf
a f a s i a
O Slovensku