Ukraine’s Pripyat River Is Like A Work of Art From Space https://www.byteseu.com/857938/ #Astrobiology #Astrophysics #Cosmology #PlanetaryScience #Space #SpaceExploration #SpaceTechnology
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https://www.ufofeed.com/116522/ukraines-pripyat-river-is-like-a-work-of-art-from-space/ Ukraine’s Pripyat River Is Like A Work of Art From Space #Astrobiology #Astrophysics #Cosmology #PlanetaryScience #Space #SpaceExploration
(21 Mar) ’We had less than a 2% chance to find this’: James Webb telescope uncovers baffling ’Big Wheel’, one of the most massive galaxies in the early universe
https://s.faithcollapsing.com/6dmxe
Archive: ais: https://archive.md/wip/9orvR ia: https://s.faithcollapsing.com/1srwx
#SilentSunday #photography #cosmology
All' unsere #Kalender bemühen sich um einen Ausgleich zwischen #Sonne und #Mond, und trotzdem: #Zeit bleibt unbeherrschabar...
https://www.bytesde.com/903424/ Aurora Alarm: Riesenloch in der Sonne und starker geomagnetischer Sturm konvergieren, um dieses Wochenende Nordlicht zu beenden #Astrobiology #Astrophysics #Cosmology #PlanetaryScience #Space #SpaceExploration #SpaceTechnology #Weltraum #Weltraumtechnik #Weltraumtechnologie #Weltraumtechnologien
(21 Mar) Telescope reveals earliest-ever ’baby pictures’ of the universe: ’We can see right back through cosmic history’
Astronomers have released the clearest images yet of the infant universe — and they confirm that the...
https://s.faithcollapsing.com/epjmw
Archive: ais: https://archive.md/wip/sidfS ia: https://s.faithcollapsing.com/j8ee5
Is our universe trapped inside a black hole?
—@Spacecom
｢ each and every black hole in our universe could be the doorway to another "baby universe." These universes would be unobservable to us because they are also behind an event horizon, a one-way light-trapping point of no return from which light cannot escape, meaning information can never travel from the interior of a black hole to an external observer ｣
Space · Is our universe trapped inside a black hole? This James Webb Space Telescope discovery might blow your mind
https://www.ufofeed.com/115880/a-star-may-explode-next-week-in-once-in-80-years-event-what-to-know/ A Star May Explode Next Week In Once-In-80-Years Event — What To Know #Astrobiology #Astrophysics #Cosmology #PlanetaryScience #Space #SpaceExploration
Europe is about to attempt its first successful commercial orbital rocket launch as it seeks to end reliance on the US/SpaceX/Musk https://www.byteseu.com/847658/ #Astrobiology #Astrophysics #Cosmology #PlanetaryScience #Space #SpaceExploration #SpaceTechnology
Astronomers intrigued by data that shows universe might stop expanding - The Washington Post
https://archive.ph/QyQen
"The “dark energy” field that has fueled the expansion has been weakening over the past 4 billion to 5 billion years, new data shows."
In the old days, we started to get excited when there was a five sigma detection (and probably 7 when you had to compare different experiments with different systematics)
Interesting article about 'Dark Energy' and new evidence pointing to a change over time. It could underpin a new theory of - well - how everything works.
Also including our very own University of Portsmouth.
BBC NewsDark Energy experiment shakes Einstein's theory of UniverseNew research could force a fundamental rethink of the nature of space and time.
Congrats to @desisurvey.bsky.social - it's looking more & more like dark energy isn't Einstein's cosmological constant! If you've woken up to the news & are searching for the publications, they don't appear to be on arxiv 
but they are online. 
#cosmology 
: data.desi.lbl.gov/public/paper...
![A graph of the evolution of the dark energy (vertical axis) as a function of time (redshift on the horizontal axis) - showing an offset from the cosmological constant (a flat horizontal line). Here is the figure caption from the paper:
FIG. 12. Comparison of the constraints on the equation of
state of dark energy using the CPL parametrization and a bin-
ning reconstruction approach, using DESI+CMB+DESY5.
The solid green line shows the best-fit w(z) based on w0 and
wa inference and the green contours around it represent the
68% and 95% confidence intervals. We also show in blue the
constraints from the binning approach [47], with the hori-
zontal bars indicating the bin width (which is fixed) and the
vertical bars representing the 1σ error. Additionally, we in-
clude in gray the 1D posterior for each binning parameter.
The ΛCDM limit corresponds to the horizontal gray dashed
line.](https://files.shakedown.social/cache/media_attachments/files/114/194/760/580/855/304/small/61807badfcee9cff.jpeg "A graph of the evolution of the dark energy (vertical axis) as a function of time (redshift on the horizontal axis) - showing an offset from the cosmological constant (a flat horizontal line). Here is the figure caption from the paper:
FIG. 12. Comparison of the constraints on the equation of
state of dark energy using the CPL parametrization and a bin-
ning reconstruction approach, using DESI+CMB+DESY5.
The solid green line shows the best-fit w(z) based on w0 and
wa inference and the green contours around it represent the
68% and 95% confidence intervals. We also show in blue the
constraints from the binning approach [47], with the hori-
zontal bars indicating the bin width (which is fixed) and the
vertical bars representing the 1σ error. Additionally, we in-
clude in gray the 1D posterior for each binning parameter.
The ΛCDM limit corresponds to the horizontal gray dashed
line.")
Could the Big Crunch theory for the end of our Universe be coming back? Or is it Heat Death?
It's all a long, long way ahead of though, but I'll prefer a Crunch over a Heat Death, the Universe could be a cycle.
The Guardian · Dark energy: mysterious cosmic force appears to be weakening, say scientists
Last year, an enormous map of the #cosmos hinted that the engine driving cosmic expansion might be sputtering.
Now physicists are back with an even bigger map, and a stronger conclusion.
Dark #energy is losing steam.
Evolving or weakening dark energy would rewrite our picture of present-day reality.
#physics #cosmology #astronomy
https://www.quantamagazine.org/is-dark-energy-getting-weaker-new-evidence-strengthens-the-case-20250319/
Quanta Magazine · Is Dark Energy Getting Weaker? New Evidence Strengthens the Case. | Quanta MagazineLast year, an enormous map of the cosmos hinted that the engine driving cosmic expansion might be sputtering. Now physicists are back with an even bigger map, and a stronger conclusion.
https://www.ufofeed.com/115540/nasa-astronauts-sunita-williams-butch-wilmore-returns-home-with-spacex/ NASA astronauts Sunita Williams, Butch Wilmore Returns Home with Spacex #Astrobiology #Astrophysics #Cosmology #PlanetaryScience #Space #SpaceExploration
Results from the Atacama Cosmology Telescope
Today is going to be a very busy day on the cosmology front – with the Euclid Q1 Data Release coming out at 11am GMT – but I’ll start off by sharing news of final data release (DR6) by the Atacama Cosmology Telescope. This was announced yesterday and includes former colleagues at Cardiff University, so congratulations to them and all concerned. Here is a pretty picture showing one of the beautiful cosmic microwave background polarization and intensity maps:
Intensity and Polarization maps from ACT: arXiv:2503.14451There are three related preprints on the arXiv today:
- The Atacama Cosmology Telescope: DR6 Maps (from which the above picture was taken).
- The Atacama Cosmology Telescope: DR6 Power Spectra, Likelihoods and ΛCDM Parameters
- The Atacama Cosmology Telescope: DR6 Constraints on Extended Cosmological Models
There’s a lot to digest in these papers but a quick skim of the abstracts gives two pertinent points. First, from the second paper:
We find that the ACT angular power spectra estimated over 10,000 deg2, and measured to arcminute scales in TT, TE and EE, are well fit by the sum of CMB and foregrounds, where the CMB spectra are described by the ΛCDM model. Combining ACT with larger-scale Planck data, the joint P-ACT dataset provides tight limits on the ingredients, expansion rate, and initial conditions of the universe.
They also find that, when combined with CMB lensing from ACT and Planck, and baryon acoustic oscillation data from the Dark Energy Spectroscopic Instrument (DESI Y1), the ACT data give a “low” value for the Hubble constant: H0=68.22 ± 0.36 km s-1 Mpc-1.
The third paper also says
In general, models introduced to increase the Hubble constant or to decrease the amplitude of density fluctuations inferred from the primary CMB are not favored by our data.
The “Hubble tension” remains!
Scientists Just Snapped the Clearest Image of the Universe’s First Light
https://scitechdaily.com/scientists-just-snapped-the-clearest-image-of-the-universes-first-light/
#Space #cosmology #science
The far side of the moon was once a vast magma ocean, Chinese lunar lander confirms https://www.byteseu.com/840548/ #Astrobiology #Astrophysics #Cosmology #PlanetaryScience #Space #SpaceExploration #SpaceTechnology
"Using 1,024 of what will eventually be 131,072 radio antennas, the first SKA-Low image shows a tiny sliver of sky dotted with ancient galaxies billions of light-years from Earth.
This first snapshot shows the system works, and will improve dramatically in the coming months and years"
The ConversationLess than 1% of the world’s biggest radio telescope is complete – but its first image reveals a sky dotted with ancient galaxiesThe SKA-Low radio telescope in Western Australia is slowly coming online. It will probe the shape of the universe and study cosmic mysteries.