Daniel Pomarède
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pomarede.bsky.social
Daniel Pomarède
@pomarede.bsky.social
7.3K followers 270 following 2.7K posts
Cosmographer at Univ. Paris-Saclay | mapping the Universe | co-discoverer of Laniakea (our home supercluster of galaxies), Hoʻoleilana, and some other (very) large scale structures
📖 https://orcid.org/0000-0003-2038-0488
▶️ https://vimeo.com/pomarede
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pomarede.bsky.social
Curiosity at work, on some ridge of the Boxwork structure.

#Mars Nov. 13, 2025 - Sol 4718 🧪🔭
Credits images: NASA/JPL-Caltech
November 17, 2025 at 5:10 PM
pomarede.bsky.social
A rock garden, captured yesterday by Perseverance

▶️ full mosaic zoomhub.net/3peYK

#Mars Nov. 16, 2025 - Sol 1685 🧪🔭
Credits images: NASA/JPL-Caltech/ASU
An ochre toned photography of rocks and sands somewhere on the rim of Jezero Crater. An ochre toned photography of rocks and sands somewhere on the rim of Jezero Crater. An ochre toned photography of rocks and sands somewhere on the rim of Jezero Crater. An ochre toned photography of rocks and sands somewhere on the rim of Jezero Crater.
November 17, 2025 at 4:36 PM
pomarede.bsky.social
Perseverance on the move. Images captured 5 hours ago.

#Mars Nov. 17, 2025 - Sol 1686
Credits: NASA/JPL-Caltech 🧪🔭
An ochre-toned image capturing a Martian landscape with the rover's UHF antenna in the foreground. Rover tracks recedes away in the distance. An ochre-toned image capturing a Martian landscape, with the rover in the foreground.
November 17, 2025 at 9:28 AM
pomarede.bsky.social
Weekend read: Métal Hurlant n°44

September 1979. Cover art by Gir (Mœbius). Includes awesome works by Serge Clerc, Denis Sire, Jeronaton, Michel Crespin, Lob+Pichard, Daniel Ceppi. And the first adventure of Jim Cutlass, by the creators of Blueberry, Gir and Charlier.

@metalhurlantoff.bsky.social
A cover of the Métal Hurlant magazine. Cover art features the main characters of the story "Mississippi River", with title reading "Le nouveau western de Gir et Charlier, Jim Cutlass!"
November 16, 2025 at 3:18 PM
pomarede.bsky.social
#APOD Astronomy Picture of the Day

Crossing Saturn's Ring Plane

Credit: NASA, ESA, JPL, ISS, Cassini Imaging Team; Processing: Fernando Garcia Navarro

apod.nasa.gov/apod/ap25111... 🧪🔭
Saturn with rings seen edge-on, and its moons Dione and Enceladus, captured by the Cassini spacecraft.
November 16, 2025 at 11:59 AM
pomarede.bsky.social
ESA’s Mars and Jupiter missions observe comet 3I/ATLAS

@esa.int is making the most of its interplanetary missions to observe the comet from multiple vantage points. 🧪🔭

www.esa.int/ESA_Multimed... @science.esa.int #3IATLAS
Infographic showing the path of comet 3I/ATLAS, the third known interstellar object to enter our Solar System. It displays the orbits of Earth, Mars and the Juice spacecraft around the Sun, along with key dates and events as comet 3I/ATLAS travels through the inner Solar System in 2025. Coloured and numbered dots mark important observation points by telescopes and spacecraft.
November 16, 2025 at 10:40 AM
pomarede.bsky.social
A solar prominence hovers over the Sun

Solar Orbiter captured a special treat on camera: a dark 'prominence' sticking out from the side of the Sun.

Credit: ESA & NASA/Solar Orbiter/EUI Team, D. Berghmans (ROB); Music: Atmos by Oliver Spencer.

www.esa.int/ESA_Multimed... 🧪🔭
November 15, 2025 at 7:19 PM
pomarede.bsky.social
A Revised Three-dimensional Visualization of the Local Group of Galaxies, by Antonio Ciccolella

☑️ research note of the AAS doi.org/10.3847/2515-5172/ae1efc
☑️ ultra-high resolution version flic.kr/p/2rD6yGU

🧪 #Cosmology
The Milky Way and its satellite dwarf galaxies. A wider view of the Milky Way and its satellite dwarf galaxies. The Andromeda galaxy and its satellite dwarf galaxies. The full visualization of the Local Group.
November 15, 2025 at 1:03 PM
pomarede.bsky.social
The Subaru Telescope, awaiting the start of observations

Credit: Sebastian Egner /NAOJ

subarutelescope.org/en/gallery/f...

🔭🧪 #Maunakea
A blue toned photography of the Subaru Telescope enclosure opened in preparation for observations. Beyond the slit, Maunakea can be seen illuminated by the setting sun.
November 14, 2025 at 4:50 PM
pomarede.bsky.social
Two large Mastcam-Z mosaics recently captured by the Mars rover Perseverance

▶️ zoomhub.net/4MWX2
▶️ zoomhub.net/gqB4n

#Mars Nov. 8, 2025 - Sol 1678 🧪🔭
Credits images: NASA/JPL-Caltech/ASU
An ochre toned mosaic of 135 images capturing a Martian landscape. An ochre toned mosaic of 42 images capturing a rocky outcrop.
November 12, 2025 at 6:10 PM
pomarede.bsky.social
in the #arXiv

Dissecting the Perseus-Pisces supercluster observed with CFHT-MegaCam: Investigating environmental effects on galaxy morphology

by Maëlie Mondelin and co-authors
arxiv.org/abs/2511.05925 🧪🔭
This is Figure 2 of paper, featuring a sky-projected distribution of galaxies in the PPSC (Perseus-Pisces Supercluster) catalog. Grey dots represent galaxies from the PPSC catalog. Group and cluster centres identified are shown as gold points: from the left to the right in the region A, A 426, AWM7, a group with UGC 1841, and A 347. The projected skeleton, extracted from the final 3D structure, is represented by dark lines and traces the projected filamentary network. The boundaries of the region A and the region B are shown in purple and blue, respectively. A cyan contour indicates the footprint of the Euclid ERO Perseus field, overlaid for reference.
November 12, 2025 at 9:36 AM
pomarede.bsky.social
Astronomy Picture of the Day

Micro Moon vs. Super Moon

Credit: Şenol Şanlı www.instagram.com/snlsanli

www.star.ucl.ac.uk/~apod/apod/a...

#APOD 🧪🔭
Two views of the full moon: at left captured near apogee when the Earth-Moon relative distance is the greatest, so that the moon appears smaller in the sky, at right captured near perigee when the moon is closest to Earth, so it appears larger. Title reads "2025 Full Moon". The so-called Micro Full Moon pictured on the left was captured on April 13, 2025, when the Earth-Moon distance was 406,006 kilometers. The so-called Super Full Moon pictured on the right was captured on November 5, 2025, when the Earth-Moon distance was 356,979 kilometers.
November 10, 2025 at 2:24 PM
pomarede.bsky.social
Martian Memories

The Alagnak ridge captured by Perseverance - Sol 629 (November 26, 2022)

Credits: NASA/JPL-Caltech/ASU/MSSS

mastcamz.asu.edu/galleries/so... #Mars 🧪🔭
A red toned mosaic capturing a Martian landscape. The central subject is the Alagnak outcrop, overlooking the vast expanses of Jezero Crater.
November 9, 2025 at 5:42 PM
pomarede.bsky.social
Freshly crushed rocks, captured in Stereo3D by Curiosity with her MAHLI Mars Hand Lens Imager

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

#Mars Nov. 6, 2025 - Sol 4711 🧪🔭
Credits: NASA/JPL-Caltech/MSSS
A dual left/right stereoscopic pair of ochre-toned photographies capturing Martian rocks. This dual image is intended to be used to obtain a Stereo3D rendition of the scene through parallel viewing, and not cross-eyed viewing. The rocks have an ochre color, with white patches exposed when the rocks were crushed by the passage of the rover wheels.
November 8, 2025 at 2:02 PM
pomarede.bsky.social
in the #arXiv

Revealing Hidden Cosmic Flows through the Zone of Avoidance with Deep Learning

by Alexandra Dupuy and co-authors
arxiv.org/abs/2511.03919 🧪 #Cosmology
3D visualization of the mean density and peculiar velocity fields in supergalactic coordinates. The isosurfaces represent the mean density field across 1,000 realizations, with three levels highlighting different density thresholds. Streamlines depict the mean peculiar velocity field, also averaged over 1,000 realizations. Tiny purple spheres mark the positions of Great Attractor (GA) candidates. Tiny grey spheres indicate the positions of streamline endpoints that were not identified as GA, where the streamlines terminated at the box limits. The orientation and scale of the visualization are shown by the SGX, SGY, and SGZ axes, represented by red, green, and blue arrows at the observer’s position (the cube center), each with a length of 10 Mpc/h.
November 7, 2025 at 10:01 AM
pomarede.bsky.social
Heron and cormorant spotted today in Saclay.
Two birds stand on the highest branches of a cedrus.
November 6, 2025 at 6:06 PM
pomarede.bsky.social
Ah, Curiosity climbed out of the trough. This 360° panorama was acquired two days ago.

▶️ zoomhub.net/BwZX5
▶️ www.360cities.net/image/mars-c...

#Mars Nov. 4, 2025 - Sol 4709 🧪🔭
Credit images: NASA/JPL-Caltech
A black and white panoramic mosaic capturing a Martian landscape, with some elements of the Mars rover Curiosity displayed in the foreground. It was acquired in the heart of the so-called Boxwork structure on the slopes of Mount Sharp in Gale Crater. The tracks of rover descending into then ascending from a trough of the Boxwork structure can be seen on the right hand side of the mosaic.
November 6, 2025 at 5:47 PM
pomarede.bsky.social
#Mars

Dust avalanches triggered by meteroid impacts, captured by the Colour and Stereo Surface Imaging System (CaSSIS) onboard the European Space Agency’s ExoMars Trace Gas Orbiter 🧪🔭

Credit: ESA/TGO/CaSSIS @esa.int @science.esa.int

➡️ www.esa.int/ESA_Multimed...
➡️ www.nature.com/articles/s41...
Dust avalanches on the slopes of Apollinaris Mons on Mars
November 6, 2025 at 2:39 PM
pomarede.bsky.social
in the #arXiv

The SPHEREx Satellite Mission

by James Bock and co-authors
arxiv.org/abs/2511.02985 #SPHEREx #Cosmology 🧪
This is Figure 6 of the paper with caption reading: Diagram of the SPHEREx observatory, showing (from top to bottom) the three conical photon shields with a cutaway view, the telescope, radiator panel for the mid-wave infrared (MWIR) detectors, the MWIR and short-wave infrared (SWIR) focal plane arrays (FPAs), and the 3-stage V-groove radiator assembly with penetrating bipods for supporting the telescope assembly. The BAE spacecraft at the bottom provides pointing, power, and telemetry and houses the instrument readout electronics.
November 6, 2025 at 10:57 AM
pomarede.bsky.social
Wow, great new vistas captured 12 hours ago by Perseverance after a long run down the rim of Jezero Crater.

📷 areo.info/mars20/ecams... @areoinfo.bsky.social

#Mars 🧪🔭
A Martian landscape: rocks, sands, hills. Captured November 5, 2025 (Sol 1675). A Martian landscape: rocks, sands, hills. Captured November 5, 2025 (Sol 1675). A Martian landscape: rocks, sands, hills, with the forward section of the rover in the foreground with PERSEVERANCE printed in capital letters on the arm of the instrumented tower. Captured November 5, 2025 (Sol 1675).
November 6, 2025 at 9:03 AM
pomarede.bsky.social
Cosmography archives

The Distribution of Extra-Galactic Nebulae

by Edwin Hubble (1934)

ui.adsabs.harvard.edu/abs/1934ApJ....

#Cosmology 🧪
An all sky map displaying the distribution of galaxies in the galactic coordinate system, in the Aitoff projection. Small dots represent survey fields with normal distribution; large disks and circles represent fields with excesses and deficiencies, with crosses added for larger ones. Dashes represent fields with no galaxies.
November 5, 2025 at 3:03 PM
pomarede.bsky.social
Never get tired of rover tracks

Images captured by Perseverance 17 hours ago on the outer slopes of the rim of Jezero Crater. 🧪🔭 #Mars

Credits: NASA/JPL-Caltech
Martian landscape with rover track and wheel in the foreground. Captured on Sol 1674. Rover tracks winding down the slopes of the rim of Jezero Crater. Rover tracks winding down the slopes of the rim of Jezero Crater.
November 5, 2025 at 2:32 PM
pomarede.bsky.social
Euclid peers through a dark cloud’s dusty veil

The dark cloud, named LDN 1641, is located at about 1300 light-years from Earth, in constellation Orion.

Credit: ESA/Euclid/Euclid Consortium/NASA, image processing by M. Schirmer (MPIA, Heidelberg)

www.esa.int/ESA_Multimed...

#Euclid 🔭🧪
The focus of the image is a portion of LDN 1641, an interstellar nebula in the constellation of Orion. In this view, a deep-black background is sprinkled with a multitude of dots (stars) of different sizes and shades of bright white. Across the sea of stars, a web of fuzzy tendrils and ribbons in varying shades of orange and brown rises from the bottom of the image towards the top-right like thin coils of smoke.
November 5, 2025 at 9:23 AM
pomarede.bsky.social
New shots of the fascinating yardang unit captured by Curiosity with her Chemcam RMI telescope 🔭🧪

#Mars Nov. 2, 2025 - Sol 4707
Credit: NASA/JPL-Caltech/LANL
A black and white image capturing a Martian landscape on the slopes of Aeolis Mons in Gale Crater. A black and white image capturing a Martian landscape on the slopes of Aeolis Mons in Gale Crater. A black and white image capturing a Martian landscape on the slopes of Aeolis Mons in Gale Crater. A black and white image capturing a Martian landscape on the slopes of Aeolis Mons in Gale Crater.
November 4, 2025 at 6:31 PM
pomarede.bsky.social
Astronomy Picture of the Day

Comet Lemmon Beyond Lomnický Peak

Credit: Robert Barsa www.instagram.com/rob.barsa/

www.star.ucl.ac.uk/~apod/apod/a...

#APOD 🧪🔭
Comet C/2025 A6 (Lemmon), captured two weeks ago, behind the Lomnický Peak of the High Tatra Mountains, home to the Slovakian Lomnický Stit Observatory. The comet sprouts two long and picturesque tails: a blue ion tail and a white dust tail.
November 4, 2025 at 11:13 AM