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sharponlooker.net
V Martín
@sharponlooker.net
140 followers 76 following 230 posts
https://mastodon.social/@sharponlooker
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Reposted by V Martín
sharponlooker.net
From 2022: 'Estelas"

Fingerpainted on tablet with #SketchbookApp

Study of the imho best unprocessed photo by #PerseveranceRover: mars.nasa.gov/mars2020-raw...

Last one, thx @jayispainting.earthskyart.ca for all your work and engagement making #ArtAdventCalendar a joy here!

#ArtAdventCalendar2025
Digital painting of the Three Forks area of Jezero Crater, with the rover's tracks visible. Cliché but appropriate Spanish poem by Antonio Machado: "Caminante, son tus huellas el camino y nada más; Caminante, no hay camino, se hace camino al andar. Al andar se hace el camino, y al volver la vista atrás se ve la senda que nunca se ha de volver a pisar. Caminante, no hay camino sino estelas en la mar."
December 23, 2025 at 11:56 PM
Reposted by V Martín
sophiecarr.bsky.social
Another one from the Kyle of Durness - black and white seemed to be in order for this one.

#Scotland #DronePhotography
B&W image of what looks like a river but is actually a channel in an estuary. Behind are some silhouetted mountains. In the foreground are som dark rippled sandbanks.
December 20, 2025 at 11:04 PM
Reposted by V Martín
sharponlooker.net
Perseverance sol 1446 (around Sally's Cove) / Statler

mars.nasa.gov/mars2020/mul... with processing from 65dBnoise (mastodon.social/@65dBnoise/1...)

13/n #muppetdolia
Crop of the processed photo, looking like the head of an old man with prominent chin. Waldorf and Statler from The Muppet Show.
December 19, 2025 at 11:26 AM
Reposted by V Martín
stim3on.bsky.social
Mine was only a proof of concept, so I'm glad someone at NASA made a more refined version.
Their version apparently fuses more streams of telemetry to represent the true rover position at very small intervals, while mine was limited to only the Navcam image locations that were interpolated.
December 18, 2025 at 9:29 AM
sharponlooker.net
Superb video included in today's JPL update for #PerseveranceRover (www.jpl.nasa.gov/news/nasas-p...). With synthetic frames and obviously, the rover doesn't move that fast, but the final result is impressive.

Credit: NASA/JPL-Caltech
December 18, 2025 at 5:18 AM
Reposted by V Martín
spacemarschall.net
Unusual “helmet-shaped” rock composed entirely of smaller spherules. This image was taken by NASA's Perseverance rover on Mars.

This image is also up for the planetary science image of 2025: bsky.app/profile/spac...

NASA/JPL-Caltech/ASU/ @jackiebranc.site
#SciComm 🧪
Unusual “witch hat” or “helmet-shaped” rock composed entirely of smaller spherules. The image was taken by the NASA rover Perseverance on Mars. Source: https://science.nasa.gov/blog/shocking-spherules/ https://jackiebranc.site/nasas-perseverance-rover-journey/
December 16, 2025 at 6:17 PM
Reposted by V Martín
jayispainting.earthskyart.ca
On Day 12, we now have about 4500 images made by humans posted at the halfway mark.

Do yourself a favour and check it out.

#Art
jayispainting.earthskyart.ca JayIsPainting 🍁 @jayispainting.earthskyart.ca · Dec 11
One Trick Doctors Don't Want You To Know About:

Your day will be vastly improved by browsing the more than 4000 images of art & beauty posted by almost 600 real humans as part of #ArtAdventCalendar

Just click or long press on the hashtag and select See #ArtAdventCalendar Posts
Screenshot of Bluesky showing options to See #ArtADventCalendar Posts and See #ArtADventCalendar Posts by User
December 12, 2025 at 5:32 PM
Reposted by V Martín
marshall-eubanks.bsky.social
To sum up
iopscience.iop.org/article/10.3...
- the initial spacecraft astrometry of 3I/ATLAS substantially improves its orbit determination
- this helped show that 3I/ATLAS has a significant non-gravitational acceleration &
- indicates 3I is significantly less massive than originally supposed.
Radware Bot Manager Captcha
To ensure we keep this website safe, please can you confirm you are a human by ticking the box below.
iopscience.iop.org
December 11, 2025 at 5:39 AM
sharponlooker.net
Rest in Form, Frank Gehry
Recent B/W own phonecam photo of Guggenheim Bilbao museum framed by Iparraguirre kalea.
December 5, 2025 at 11:03 PM
Reposted by V Martín
jayispainting.earthskyart.ca
Day 3 #ArtAdventCalendar

Badlands
36x48in 91x121cm
Oil on Canvas
2023 #Art #Painting
Abstract landscape painting of a river valley badlands with swirling clouds above with sunset skies behind.
December 3, 2025 at 3:35 PM
Reposted by V Martín
sharponlooker.net
Cut of the original video with the #3IATLAS cameo. The video is reversed, I find it easier to find it with it going from right to left. Its path starts below the saturated region on the middle right and goes in a slight diagonal towards the left.
December 3, 2025 at 11:34 AM
sharponlooker.net
#WundaCrater #UmbrielMoon
michael-w-busch.bsky.social Michael Busch @michael-w-busch.bsky.social · Sep 12
Jennifer Scully, @spacewhalerider.com, et al. suggest that bright material in Wunda crater on Umbriel could be a brine / salt deposit like Occator crater on Ceres, rather than cold-trapped CO2 or other ice: meetingorganizer.copernicus.org/EPSC-DPS2025....

Huh.

Need more data.

#EPSCDPS2025
Abstract EPSC-DPS2025-381
meetingorganizer.copernicus.org
December 2, 2025 at 8:16 AM
sharponlooker.net
"Neretva Lake"

Styluspainted on tablet with #SketchbookApp

#ArtAdventCalendar #ArtAdventCalendar2025
We're smack in the middle of Neretva Vallis, Jezero crater, Mars, looking towards the crater breach, but there's quiet waters around us mirroring the surrounding hills and the sky is blue and cloudy.
December 1, 2025 at 6:00 AM
Reposted by V Martín
sharponlooker.net
The "translucent ripples" effect, I hadn't felt it since the Valinor ripples where Ingenuity now lays.
Crop of the OP photo focused on a large ripple and its bifurcations seen longitudinally. The color treatment and the ripple structure make it look as if the ripples' insides are glowing.
November 27, 2025 at 8:32 PM
sharponlooker.net
#JezeroAstrotourists thus far in bsky
sharponlooker.net V Martín @sharponlooker.net · Dec 16
For today's #ArtAdventCalendar, the "astrotourists in Jezero crater" series

From 2022, 2023 & 2024 : "Dasein", "Tourist at Kodiak", "Map of the Jezero Delta, Tolkien-style", "Not My Best Side"

All finger- or styluspainted on tablet with #SketchbookApp
"Dasein" Digital painting: closeup of an astronaut contemplating the northern side of Kodiak butte, their helmet visor heavily distorting the view "Tourist at Kodiak" Digital painting of a cross-bedded layer of Kodiak butte. An astronaut in full suit stands in the midst of it reading a signpost that, according to this version's caption, reads "Please don't lick the rocks" "Map of the Jezero Delta, Tolkien-style" Digital drawing of a schematic map of the Jezero delta and surroundings, something you might get at the souvenir store? Some features retain their mission names (Kodiak, Cape Nukshak, Whale Mountain, Cape Sable, Rocky Top, Three Forks, Delta Front), others get a "tolkienized", half-joking variant (Belva's Bottom, Carbonaith for the Margin Unit, Neretva Vallis becomes NoRet Valley and the rim becomes Craterrimrim). Dragonera shows a dragon on top and Cabrera a goat, obviously. By the sample depot, there's a stick figure of the backshell and the parachute. "Not My Best Side" Digital painting of two astronauts taking photographs on a ridge overlooking the west side of Kodiak butte
November 27, 2025 at 9:54 AM
sharponlooker.net
Snodgrass et al: "Considerations on the process of target selection for the
@cometinterceptor.bsky.social
mission"
arxiv.org/abs/2511.20521

#PlanetSci #PlanetaryScience #CometInterceptorMission
Table 1 from the linked paper, spacecraft constraints. Encounter can't be far from 1AU. First paragraph of section 2.3, Dynamical Constraints. LPC = long period comet, DNC = dynamically new comet, ISO = interstellar object. Highlighted line is about the unlikelihood that the spacecraft will encounter an ISO.
November 26, 2025 at 11:05 AM
Reposted by V Martín
spacemarschall.net
Hey #planetSci friends, the end of the year is nearing. Does anyone want to help me put together an Image of the Year Bracket?

If you want to propose your favourite planetary science image of 2025, place it below with a link to the source and when it was published.
Bracket for "BSky Planetary Science Image of 2025" contest, featuring small icon of 16 boxes with question marks grouped into four quarter-finals. There are finalist placeholders against a lunar surface backdrop.
November 24, 2025 at 4:04 PM
sharponlooker.net
@wierzchos.bsky.social qué sorpresa encontrarte referido en un paper sobre coatings en Marte, se me había olvidado a lo que se dedicaba tu padre 😉

onlinelibrary.wiley.com/doi/10.1111/...

agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Microbial colonization of Ca‐sulfate crusts in the hyperarid core of the Atacama Desert: implications for the search for life on Mars
The scarcity of liquid water in the hyperarid core of the Atacama Desert makes this region one of the most challenging environments for life on Earth. The low numbers of microbial cells in the soils ...
onlinelibrary.wiley.com
September 26, 2025 at 5:02 PM
Reposted by V Martín
stuartatkinson.bsky.social
Yesterday Curiosity took pix of jagged peaks in the distance with its ChemCam. I stitched them together, did some work on them, and... just look at that view... I've been doing this since Sojourner landed & this is one of my fave images ever... Credits: NASA/JPL-Caltech/LANL/S Atkinson
September 23, 2025 at 8:48 PM
sharponlooker.net
Quick & dirty animation of pre- and post-abrasion WATSON photos by #PerseveranceRover on sols 1630 & 1631. Based on treated images by 65dBnoise:

mastodon.social/@65dBnoise/1...

mastodon.social/@65dBnoise/1...
September 22, 2025 at 2:24 PM
Reposted by V Martín
ticeonmars.bsky.social
I've been asked a few times over the last few days what I think the chances are that the "leopard spots and poppy seeds" on Mars will turn out to be actual evidence of life. People are naturally skeptical given the history of possible signs of life on other planets. Strap in: long thread ahead...
Image collected by WATSON on the Perseverance rover of "Cheyava Falls," a rock on Mars containing potential biosignatures
September 16, 2025 at 5:10 AM
sharponlooker.net
Today I happened to leave Jezero crater 🙃

(mastodon.social/@sharponlook...)
A road sign deep in Sweden pointing to, among other places, Ulricehamn, namesake of one of the minor craters right outside Jezero crater on Mars.
September 16, 2025 at 7:27 PM
Reposted by V Martín
timdemko.xyz
After poking around and finding the base of the flow, the story became much richer: the basalt had flowed over some eolian dunes which sourced the water for the hydrothermal system. The sand might have accumulated as obstacle dunes around a bedrock hill, then buried by the flow in a valley. (2/2)
Outcrop photo of Miocene eolian dune deposits overlain by vesicular basalt. The dune deposits are light orange-brown and characterized by wind ripple/translatent (pin-stripe) laminations, and the basalt is very dark reddish brown. the contact is very sharp. There is ddesert vegetation, including saguaro cacti visible in the background. Outcrop photo of Miocene eolian dune deposits overlain by vesicular basalt. The dune deposits are light orange-brown and characterized by wind ripple/translatent (pin-stripe) laminations, and the basalt is very dark reddish brown. The basalt exhibits intense fracturing, with light colored fracture fills. the contact is very sharp. There is an archaeologist (Madi Whalen) for scale. Outcrop photo of Miocene eolian dune deposits overlain by vesicular basalt. The dune deposits are light orange-brown and characterized by wind ripple/translatent (pin-stripe) laminations, and the basalt is very dark reddish brown. The basalt exhibits intense fracturing, with light colored fracture fills. There is an archaeologist (Madi Whalen) for scale. Outcrop photo of Miocene eolian dune deposits overlain by vesicular basalt. The dune deposits are light orange-brown and characterized by wind ripple/translatent (pin-stripe) laminations, and the basalt is very dark reddish brown. The basalt exhibits intense fracturing, especially at the contact with the underlying sandstone, with light colored fracture fills. The units and the contact are offset by a small vertical fault.
September 9, 2025 at 3:57 AM
Reposted by V Martín
astrafoxen.bsky.social
The IAU announced official names for Donaldjohanson's surface & shape features 2 weeks ago, but nobody has mentioned the news. They're all named after archeological sites and hominin fossils, which is fun and awesome haha

(Afar Lobus = small lobe, Olduvai Lobus = big lobe, Windover Collum = neck)
Lucy image of asteroid Donaldjohanson, with features labeled with their formal names approved by the IAU A screenshot of the IAU's announcement of 11 new names for Donaldjohanson's surface+shape features. The text reads: 11 Names Approved for (52246) Donaldjohanson: Afar Lobus, Olduvai Lobus, Hadar Regio, Minatogawa Regio, Luzia Dorsum, Boxgrove Saxum, Kennewick Saxum, Cashel Saxum, Mungo, Narmada, and Windover Collum 08/27/2025 The IAU Working Group for Planetary System Nomenclature has approved the names Afar Lobus, Olduvai Lobus, Hadar Regio, Minatogawa Regio, Luzia Dorsum, Boxgrove Saxum, Mungo, Narmada, Kennewick Saxum, Cashel Saxum, and Windover Collum for eleven features on the asteroid (52246) Donaldjohanson. For more information, please see the Donaldjohanson nomenclature map in the Gazetteer of Planetary Nomenclature.
September 9, 2025 at 7:11 AM
sharponlooker.net
There's a lot happening in that closeup, great color work!

But don't zoom & rotate too much, maybe you get a scare 😬
Hugely zoomed part of the photo, rotated to show a rock bit that looks like a spooky head flashing its teeth. Reminds a little of Marty Feldman in Young Frankenstein.
September 1, 2025 at 9:02 AM