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pomarede

@pomarede@mastodon.social

cosmographer at university paris-saclay | mapping the universe | co-discoverer of

#laniakea our home supercluster of galaxies | #dipolerepeller a void contributing to the motion of our galaxy | #coldspotrepeller a void associated to the coldest point of the big bang fossil radiation | #southpolewall a giant galactic filament of the cosmic web | #hooleilana the relic of a baryon acoustic oscillation

https://vimeo.com/pomarede | https://sketchfab.com/pomarede | https://youtube.com/@pomarede

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pomarede, to boulder
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Martian Vistas

Check out this epic Stereo3D vision captured by Perseverance, where the stereoscopic effect is strongly enhanced by the foreground boulder field.

To go 3D: eyes' lines of sight parallel, left image for left eye, right image for right eye

Credit images: NASA/JPL-Caltech/ASU

pomarede, to Kurzgesagt
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Sols 4157-4158: What is That??

Curiosity finds odd rocks with "dragon scales" texture.
"We have seen a lot of layered rocks over the last 12 years on Mars, but these ones really stand out by the dizzying pattern they trace on the rock surfaces."

https://science.nasa.gov/missions/mars-science-laboratory/sols-4157-4158-what-is-that/

pomarede, to Astronomy
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Stellar surprise – astronomers uncover methane emission on a cold brown dwarf for the first time

https://www.tcd.ie/news_events/articles/2024/stellar-surprise--astronomers-uncover-methane-emission-on-a-cold-brown-dwarf-for-the-first-time/

📷 This artist concept portrays the brown dwarf W1935. The team speculates that the methane emission may be due to processes generating aurorae, shown here in red. Credit: NASA, ESA, CSA, Leah Hustak (Space Telescope Science Institute).

franco_vazza, (edited ) to random
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In an expected turn of events which bypasses the law of geography, the is going to cross at the end of June.
wtf?

pomarede,
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@franco_vazza Ciao Franco, it's going to be on June 30th: https://www.letour.fr/fr/etape-2
Cheers, Daniel

pomarede,
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@franco_vazza they do start the Tour in foreign countries every year, for promotional purposes. Recently in Denmark for example. Giro did it as well in Israel a few years ago, they raced in the desert!

pomarede, to Kurzgesagt
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wow what a fascinating Martian sight, wish there were a dual stereo pair of images to see this one in 3D!

This image was taken by the Left Navigation Camera onboard NASA's Mars rover Curiosity on Sol 4155 (2024-04-14).

Credits: NASA/JPL-Caltech

https://mars.nasa.gov/raw_images/1320755/

pomarede,
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@PaulHammond51 Oh wow, fantastic, thanks a lot Paul!
How did you know it was there, since it is not displayed on the raw images web page? I see that the two images have the same link except with a NRB instead of NLB. Does it mean that all images are available as pairs in the same way?

pomarede,
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Absolutely fascinating Stereo3D view of this Martian landscape.

Many thanks to @PaulHammond51 for finding the right-eye view from the rover's R-Nav Cam.

To get the Stereo3D effect, just let your eyes' line of sight be parallel (not cross-eyed) with left eye in front of left image and right eye in front of right image.

#mars #curiosity #rover #Stereo3D #3D #space #sand #rocks #wind #landscape #MountSharp #GaleCrater #astronomy #astrodon #science #STEM #photography #nasa #JPL #Caltech

pomarede,
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@PaulHammond51 there is so much interesting stuff going in this picture, on many layers of distance, including the most remote one.

pomarede, to Cosmology
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World’s top cosmologists convene to question conventional view of the universe

Meeting at London’s Royal Society will scrutinise basic model first formulated in 1922 that universe is a vast, even expanse with no notable features.

https://www.theguardian.com/science/2024/apr/14/worlds-top-cosmologists-convene-to-question-conventional-view-of-the-universe

#cosmology #conference #London #RAS #universe #astronomy #astrophysics #astrodon #science #bigring #galaxies #HubbleConstant

pomarede,
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First talk by Jim Peebles on the Status of the LCDM theory: supporting evidence and anomalies

... including an update of the evidence of large-scale sheet-like patterns in the space distributions of galaxies, clusters of galaxies, and quasars.

https://royalsociety.org/science-events-and-lectures/2024/04/cosmological-model/

#cosmology #LCDM #theory #JimPeebles #galaxies #galaxyclusters #quasars

pomarede, to Cosmology
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Improving the foundation of the cosmic distance ladder and reinforcing the possibility of physics beyond ΛCDM:

Small Magellanic Cloud Cepheids Observed with HST Provide a New Anchor for the SH0ES Distance Ladder
by Louise Breuval and co-authors
https://arxiv.org/abs/2404.08038

pomarede, to photography
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A self-portrait by Perseverance, captured two days ago

The Martian rover acquired this image using its SHERLOC WATSON camera, located on the turret at the end of its robotic arm.

Image was acquired on April 13, 2024 (Sol 1119). Credit: NASA/JPL-Caltech
https://mars.nasa.gov/mars2020/multimedia/raw-images/SIF_1119_0766280902_511EBY_N0514014SRLC07021_0000LMJ

#mars #perseverance #rover #selfie #portrait #photography #astrodon #science #STEM #SHERLOC #WAYSON #camera

pomarede, to Cameras
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See the sundial and color swatches of Perseverance in Stereo3D, like if you were on board the #rover. Just let your eyes' line of sight be parallel (not cross-eyed) with left eye in front of left image and right eye in front of right image.

More insights on the sundial and other hidden gems riding aboard #Perseverance: https://www.nasa.gov/centers-and-facilities/jpl/5-hidden-gems-are-riding-aboard-nasas-perseverance-rover/

A more technical description of the calibration targets for the Mastcam-Z #cameras: https://mastcamz.asu.edu/mars-in-full-color

#mars #space #astrodon #stereo #3D #sundial

pomarede, to Cosmology
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Physics Today covers appreciation post

A Rule for the Cosmos (2017)

Feature article by Will J. Percival on Baryon Acoustic Oscillations as a Cosmological Ruler
https://doi.org/10.1063/PT.3.3789

#cosmology #physics #physicstoday #cover #covers #BAO #baryon #acoustic #oscillations #galaxies #darkenergy #acousticwaves #waves #universe #origin #telescopes #leptons #baryons #astronomy #astrophysics #astrodon #science #STEM

pomarede, to random
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A selection of eclipses that made the cover of Nature and Science Magazine

Partial eclipse of the sun, New York, 2 October 1959. The picture was taken over Manhattan

https://www.science.org/toc/science/130/3383

pomarede,
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1973, waiting for the Eclipse

pomarede,
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The historic flight of Concorde chasing the eclipse

pomarede,
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pomarede,
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A new generation of solar eclipse research

On the cover, a composite of 25 images showing the east limb of the Sun during the total solar eclipse of 1 August 2008, observed from Mongolia.

https://nature.com/nature/volumes/459/issues/7248

pomarede,
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Six centuries of solar eclipse art.

Solar Eclipse, 1932, by Howard Russell Butler

https://www.nature.com/nature/volumes/508/issues/7496

pomarede, to photography
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Concorde + Solar Eclipse = stunning shot

© Nature 1975

pomarede,
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This amazing picture of Concorde 001 racing against the 1973 solar eclipse is credited to Arthur Gibson

https://photo.stackexchange.com/questions/8362

image/jpeg

pomarede, to random
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Folks are waiting for the Eclipse

© Nature 1973

pomarede, to Cosmology
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