@pomarede@mastodon.social
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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

This profile is from a federated server and may be incomplete. Browse more on the original instance.

pomarede, to modeltrains
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Discovery alert!

A spherical shell-like structure 1 billion light-years in diameter named Ho’oleilana is discovered in the distribution of relatively nearby galaxies. We posit this is the 1st observation of an individual Baryon Acoustic Oscillation (BAO).

https://doi.org/10.3847/1538-4357/aceaf3

'oleilana

pomarede, to space
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To celebrate the recovery of communications with , here is a bunch of classic Science Magazine, Nature, and Nature Astronomy covers featuring the adventures of the epic spacecraft, now located 19.9 billion kilometers away from Earth 🌍 📡 🚀

On 30 August 2007 Voyager 2 began to cross the termination shock, a boundary produced by the inter-action of the Sun with the rest of the Galaxy, where the supersonic solar wind abruptly slows as it presses outward against the surrounding interstellar matter. Five Letters in this issue present the data that the probe sent back. The Voyager 2 crossings occurred about 1.5 billion kilometres closer to the Sun than those of Voyager 1, illustrating the asymmetry of the heliosphere. Meanwhile, Voyagers 1 and 2 head for interstellar space, so may still have more to tell us. Cover graphic: Henry Kline/JPL
A cover of the Nature Astronomy Journal featuring the Voyager 2 spacecraft on its way out of the heliosphere. After 41 years of travel, Voyager 2 exited the heliosphere on 5 November 2018 at a distance of 119 au. This issue features five papers reporting plasma, particle and magnetic field measurements from the heliosheath, heliopause and interstellar medium, and their implications for our knowledge of the heliosphere.

pomarede, to Cosmology
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100 years ago tonight: Edwin Hubble discovers the Universe

This photographic glass plate captured by Edwin Hubble on October 6, 1923, at Carnegie’s Mount Wilson Observatory forever changed our understanding of the universe and paved the way for modern astronomy.

https://carnegiescience.edu/video-var-plate-100th-anniversary
https://obs.carnegiescience.edu/PAST/m31var

#universe #cosmology #astronomy #astrophysics #science #astrodon #otd #hubble #M31 #andromeda #galaxy

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pomarede, to sciencefiction
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The History of Science Fiction diagram, by Ward Shelley

http://www.wardshelley.com/paintings/pages/HistoryofScienceFiction.html

#sciencefiction #scifi #history #starwars #startrek #alien #dune #cyberpunk #amazingstories #julesverne #pulp #magazines #pulpmagazines #foundation #hgwells #space #opera #spaceopera #BattleStarGalactica #matrix #bladerunner #heinlein #isaacazimov #metropolis #science #fantasy #adventure #kafka #themartianchronicles #robot #robots #philipkdick #planetoftheapes #terminator #doctorwho #theprisoner

pomarede, to Astro
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A list of astronomers on Mastodon, by Kelly Truelove @TrueSciPhi
https://truesciphi.org/ast_mas_col.html

Credit image: Aurich Lawson | Getty Images

pomarede, to space
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NASA’s Juno Mission Measures Oxygen Production at Europa

The ice-covered Jovian moon generates 1,000 tons of oxygen every 24 hours – enough to keep a million humans breathing for a day.

https://www.nasa.gov/missions/juno/nasas-juno-mission-measures-oxygen-production-at-europa/

pomarede, to Astronomy
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Dramatically backlit dust lanes in NGC 7049

The NASA/ESA Hubble Space Telescope captured this image of NGC 7049 in the constellation of Indus, in the southern sky. The dust lanes, which appear as a lacy web, are backlit by the millions of stars in the galaxy's halo.

https://esahubble.org/images/heic0905a/

Credit: NASA, ESA and W. Harris (McMaster University, Ontario, Canada)

pomarede, to Kurzgesagt
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Why is Methane Seeping on Mars?

The most surprising revelation from NASA’s Curiosity Mars Rover — that methane is seeping from the surface of Gale Crater — has scientists scratching their heads.

https://science.nasa.gov/solar-system/planets/mars/why-is-methane-seeping-on-mars-nasa-scientists-have-new-ideas/

#Mars #curiosity #rover #methane #GaleCrater #geology #geophysics #regolith #soil #salt #chemistry #astrodon #space #science #STEM

pomarede, to space
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Speculative solar system landscapes

On the Shores of Lake Bonestell, by Ron Miller - 2009

https://ciclops.org/view/6128.html

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 Life
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🚨 News from the Kuiper Belt

SwRI scientists find evidence of geothermal processes producing methane from within icy dwarf planets Eris and Makemake

➡️ press release https://swri.org/press-release/swri-scientists-find-evidence-of-geothermal-activity-within-icy-dwarf-planets

➡️ Icarus paper https://doi.org/10.1016/j.icarus.2024.115999

pomarede, to Cosmology
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Arno A. Penzias, 90, Dies; Nobel Physicist Confirmed Big Bang Theory

His 1964 discovery with Robert W. Wilson settled a debate over the origin and evolution of the universe.

https://www.nytimes.com/2024/01/22/science/space/arno-a-penzias-dead.html

pomarede, to Astronomy
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Bonestell, APOD, same vibe

left: Saturn as seen from Titan, by Chesley Bonestell - 1944
right: Plane Crossing Crescent Moon, © Juned Patel, APOD 23/12/04

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pomarede, to ska
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in the

The SARAO MeerKAT 1.3 GHz Galactic Plane Survey

... with new insights on what's lurking in the Zone of Avoidance:
⭐️ The Vela Supercluster
⭐️ The Great Attractor
⭐️ The Local Void

by Sharmila Goedhart and co-authors
https://arxiv.org/abs/2312.07275

pomarede, to space
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Speculative solar system landscapes

Rain on Titan, by David A. Hardy - 2011

https://ciclops.org/view/6752.html

#spaceart #space #art #astroart #titan #rain #raining #methane #storm #rainstorms #clouds #lightning #sky #cassini #saturn #planet #planets #satellite #satellites #moon #moons #DavidHardy #artist #solarsystem #landscape #landscapes #astronomy #astrodon #universe

pomarede, to britishcolumbia
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The k’niPatn k’l⌣ stk’masqt outrigger (KKO) telescope.

The site is on the traditional territory of the People in . The Upper Band offered the name, which means “a listening device for outer space”.

https://arxiv.org/abs/2402.07898

This aims to add VLBI-localization capabilities (host identification) to , the Canadian Hydrogen Intensity Mapping Experiment radiotelescope (https://chime-experiment.ca/).

pomarede, to random
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💔 the jungle surrounding the Arecibo Telescope slowly claiming what’s left of the facility’s 305-metre-wide dish.

Credit: Ángel Enrique Valentín for Nature
https://www.nature.com/articles/d41586-023-02503-x

pomarede, to ocean
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Mimas’s surprise ocean prompts an update of the rule book for moons

The shifting orbit of one of Saturn’s moons indicates that the satellite has a subsurface ocean, contradicting theories that its interior is entirely solid.

https://www.nature.com/articles/d41586-024-00194-6

pomarede, to lotr
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Ingenuity at Valinor Hills

The Ingenuity team has nicknamed the spot where the helicopter completed its final flight “Valinor Hills” after the fictional location in J.R.R. Tolkien’s fantasy novels, which include “The Lord of the Rings” trilogy.

https://mars.nasa.gov/resources/27919/perseverance-spots-ingenuity-at-its-final-airfield

pomarede, to ska
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SKAMPI, the first prototype dish of the 197-dish SKA-Mid telescope constructed in South Africa, has achieved first light.

https://www.skao.int/en/news/512/ska-mid-prototype-dish-creates-first-light-image

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pomarede, to space
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Gaia unravels two ancient streams of stars in the Milky Way

The two streams, named Shakti and Shiva, helped form the infant Milky Way. Both are so ancient that they likely formed before even the oldest parts of our present-day galaxy’s spiral arms and disc.

This image shows the location and distribution of Shakti (yellow) and Shiva (blue) stars throughout the #MilkyWay.

https://www.esa.int/Science_Exploration/Space_Science/Gaia/Gaia_unravels_the_ancient_threads_of_the_Milky_Way

#gaia #galaxy #Shakti #Shiva #stream #streams #stars #esa #space #astronomy #astrodon #science

pomarede, to Astronomy
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Sthabile Kolwa uses data from South Africa’s MeerKAT telescope to shed light on black holes and how the Universe evolves.

https://www.nature.com/articles/d41586-023-03900-y

✍️ by Linda Nordling
📷 by Chris de Beer-Procter

"science

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 space
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Space Oddity

The amazing “Sombrero Rock” captured in Stereo3D by Perseverance on Sol 907 (Sept. 8, 2023).

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,
@pomarede@mastodon.social avatar

Check out this post by Eleni Ravanis on the case hardening process that might have led to its formation. Associated with near-surface water-rock interactions, its study could have implications for past climate and surface water on Mars.

https://science.nasa.gov/missions/mars-2020-perseverance/sombrero-rock-a-case-of-case-hardening/

pomarede, to space
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Nature astro covers appreciation post

Sands of Titan (2015)

https://nature.com/nature/volumes/517/issues/7532

pomarede,
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Stunning on the cover of the new issue of Nature

Planet Eaters - The stars that capture and ingest nearby worlds

https://www.nature.com/nature/volumes/627/issues/8004

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