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Dr. Fred J. Calef III

@mapperwocky.bsky.social
3.9K followers 1.6K following 4.6K posts

Science Systems Engineer @NASA/JPL-Caltech. PhD in Geology. 30+ years Geospatial experience. PI for the FOSS4G Multi-Mission Geographic Information System (MMGIS github.com/NASA-AMMOS/MMGIS). Not a NASA account. Never met a rock I wouldn’t lick.

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Reposted by Dr. Fred J. Calef III
Veeloxxy Bites @the-episiarch.bsky.social · 7h
Tiny orbs are getting all up in these crabs and secretly eating their eggs 🧪 esajournals.onlinelibrary.wiley.com/doi/10.1002/...
An adult nicothoid copeod with pink eggs getting among a bunch of developing crab eggsStrings of developing crab eggs along with adult nicothoid copeodsCrab egg mass which looks maroon due to the heavy infestation adult nicothoid carrying pink eggs
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AFP News Agency @en.afp.com · 6h
Women in Indonesian Borneo risk life and limb to battle blazes making their communities sick. More than 100 women are volunteer members of an initiative dubbed "Power of Mama", patrolling daily for smoke and flames and jumping in to put out fires when needed
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Aaron Rupar @atrupar.com · 11h
I for one think it’s bad that the president can just say crazy stuff all day every day and 99% of it doesn’t make the news because we’ve normalized having an insane president
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AstroArxiv @astroarxiv.bsky.social · 6h
Sub-kiloparsec Test of the Kennicutt-Schmidt Relation in a Strongly Lensed Dusty Star-Forming Galaxy at z~2.78. C. Cornil-Baïotto et. al. arxiv.org/abs/2609.40233
Figure 1Figure 2Figure 3Figure 4
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Alberta Claw @albertonykus.bsky.social · 13h
Reevaluation of the theropod dinosaur Geminiraptor: journals.plos.org/plosone/arti... Once thought to be a troodontid, now reclassified as a second species of the therizinosaur Falcarius. (Skull of F. utahensis for comparison in [A].) 🪶🧪 (📷 @freewillie643.bsky.social et al.)
Digital models of the skull bones of two closely related omnivorous dinosaurs.
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Museum of Science @museumofscience.bsky.social · 13h
Did you know you can turn a leaf into a working boat with dish soap? 🍃🚢🧪 @alexdainis.bsky.social shows how it works! #Chemistry #Science #STEM #ScienceDemo #ScienceFacts
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Mika McKinnon @mikamckinnon.bsky.social · 15h
I went to Sombr’s first arena show last night. It was exactly the blend of awkward-earnest you’d expect from a 21yo rockstar with legions of teenage fans. But now I’m fixated on how I can convince Roger’s Arena into hosting a seismometer for match day & concert seismology. pnsn.org/blog/experim...
pnsn.org
Experiments in Sports Seismology for the World Cup
Building on our previous experiments in sports seismology, PNSN is planning to stream real-time seismogram data from our seismometers around the stadium during upcoming World Cup matches in Seattle.
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Debra's Astrophotography @debraceravolo.bsky.social · 15h
Harvest Moon captured early morning on September 26, 2026. The bright Moon shines through the clouds giving the illusion of being in front of the clouds. 🙃 #astrophotography #astronomy #moon #full-moon
Bright full Harvest Moon shines through clouds.
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Carl Quintanilla @carlquintanilla.bsky.social · 16h
Four-byline alert: “.. Meta claimed that $4.1 billion of stock options exercised by Mr. Zuckerberg counted as a research expense ..” @nytimes.com $META www.nytimes.com/2026/09/30/t...
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DeniseG @denisegutzmer.bsky.social · 13h
The US Monthly Drought Outlook for October shows drought may persist in parts of the West, upper Midwest, Puerto Rico and Virgin Islands. Drought may improve/be removed in the Northern Plains, southern US and Northeast. No drought development expected #drought 🧪 www.cpc.ncep.noaa.gov/products/exp...
The U.S. Monthly Drought Outlook shows where drought may persist, improve, be removed, or develop over the next month.
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ProPublica @propublica.org · 13h
A policy expert described Education Secretary Linda McMahon’s push in favor of private schools as a “great American heist,” funneling money from public schools: “It’s a strategic theft of the future of our country, our kids and our democracy.” (Published Oct. 2025)
propublica.org
These Activists Want to Dismantle Public Schools. Now They Run the Education Department.
Under Trump, the Department of Education has been bringing in activists hostile to public schools. It could mean a new era of private and religious schools boosted by tax dollars — and the end of publ...
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Reposted by Dr. Fred J. Calef III
NPS Cambot @nps-cambot.bsky.social · 13h
Kuwohi Webcam, Great Smoky Mountains National Park #NPS #NationalParkService #GreatSmokyMountains
Rolling mountain view from the highest point in the Smokies. Snow-dusted trees in foreground.
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SoCal Leslie @socalleslie.bsky.social · 13h
Royal tern in LaJolla. 🪶
Royal tern at LaJolla tidepools.
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US National Gemini Office @usngo.bsky.social · 14h
Science observations @GeminiObs from 2026-09-24 to 2026-09-30: #astronomy
Gemini weekly footprint
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Katie Mack @astrokatie.com · 13h
One of the most harrowing things about academia, when you're a grad student, is how vulnerable you are to how you're perceived by more senior researchers. Your career advancement depends on confidential letters of reference & private discussions amongst faculty. You have no information or control.
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Dave Levitan @davelevitan.bsky.social · 13h
Every Pete Hegseth speech just sounds like the worst kid in middle school fell asleep watching Patton and forgot he had to give a book report in English class the next day
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Tyler Nordgren @spaceart.bsky.social · 14h
I’m working on a design for Hawaii Volcanoes incorporating all the ways the park is special at night - both below the horizon and above. #art #astronomy www.SpaceArtTravelBureau.com
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Howard Lee @hlee.bsky.social · 17h
"The fossils’ sulfur signatures suggest Conotubus hemiannulatus lived where oxygen and sulfide overlapped, and that bacteria were actively processing sulfur in their habitat." ⚒️🧪 www.sci.news/paleontology...
sci.news
Chemosymbiosis between Animals and Microbes May Predate the Cambrian: Study | Sci.News
A tubular marine creature that lived on the seafloor more than 540 million years ago may have survived in toxic, sulfur-rich waters by teaming up with bacteria.
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Reposted by Dr. Fred J. Calef III
Matt Novak @paleofuture.bsky.social · 13h
"About 5.2 million Americans like Covelli have lost SNAP benefits since the OBBBA was enacted..."
cbsnews.com
Millions of Americans are losing SNAP benefits: "It feels as though people are being punished"
More than 5 million Americans have lost food-stamp benefits since 2025. "I have to prove that I'm sick," one SNAP recipient said.
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cosmos4u.bsky.social @cosmos4u.bsky.social · 13h
Revised dust content and grain size of exposed water ice at the North Pole of Mars: www.nature.com/articles/s44... -> The north pole of Mars is less dusty than scientists thought: www.washington.edu/news/2026/09...
nature.com
Revised dust content and grain size of exposed water ice at the North Pole of Mars - npj Space Exploration
npj Space Exploration - Revised dust content and grain size of exposed water ice at the North Pole of Mars
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Reposted by Dr. Fred J. Calef III
Alison Fisk @alisonfisk.bsky.social · 16h
Fabulous fragment of an ancient Egyptian wall relief with three bears and an oil jar. The paint has survived some 4,500 years! Limestone relief from the Pyramid Temple of Sahure, Old Kingdom, 5th Dynasty, c. 2496-2483 BC. Neues Museum, Berlin 📷 by me #ReliefWednesday #Archaeology
My photo shows a circa 4,500-year-old limestone relief with some well-preserved paint in places, from the funerary temple of Sahure at Abusir, measuring 39 × 35 × 8.5 cm. It shows three bears (partial view only) and a tall one-handled pottery vessel, across two registers. The upper register at left, shows the two leds and hindquarters of a bear, and at right, a bear’s lowered head, chest, and foreleg, painted mid-brown. The lower register at left shows a tall, dark-reddish-brown pottery vessel with a long neck and single handle, and at right, the lowered head, neck, shoulder, and top of foreleg of a dark-brown bear. The bears wear collars tethered by ropes to looped fixtures in the ground. The fragment comes from a wall scene depicting tributes from the Levant. Bears were not native to Egypt. The bears represented are Syrian brown bears  (Ursus arctos syriacus), which were quite common in Levantine mountain regions in antiquity. They were kept as exotic animals in enclosures by Egyptian kings, and also hunted.
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Steven L. Taylor @sltaylor.bsky.social · 19h
It is becoming impossible to think of members of SCOTUS as "Justices." outsidethebeltway.com/scotus-cruel...
outsidethebeltway.com
SCOTUS: Cruelty Without Due Process to Continue
The shadow docket strikes again, as the NYT reports: Supreme Court Allows Rapid Third-Country Deportations, for Now. The Supreme Court on Tuesday gave President Trump a temporary victory on a centr…
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Steven J. Gibbons @stevenjgibbons.bsky.social · 30/09/2026
Last month we published a Comment in Nature Reviews: Earth and Environment entitled "Ethical considerations for #geohazard digital twins". The full article is on doi.org/10.1038/s430... There is a read-only link on rdcu.be/fw1xz Full text after embargo period and I can provide pdfs to individuals.
Screenshot of parts of the comment article "Ethical considerations for geohazard digital twins" published in Nature Reviews: Earth and Environment.
The full article is on https://doi.org/10.1038/s43017-026-00811-0
There is a read-only link on https://rdcu.be/fw1xz

A full text will be made available after the embargo period but the read-only link is valid from now.
pdf-files of the final document can be provided in response to personal requests to steven.gibbons@ngi.no
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Anthony Michael Kreis @anthonymkreis.bsky.social · 29/09/2026
Can’t do student loan relief. Can’t mandate vaccines. Can’t help home owners. Can commit human rights abuses.
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Reposted by Dr. Fred J. Calef III
Don Moynihan @donmoyn.bsky.social · 19h
Pete Hegseth removing tenure protections shows precisely why they are needed. He wants to silence dissent by being able to fire anyone who questions his vision of the military. www.militarytimes.com/news/pentago...
militarytimes.com
Hegseth halts tenure appointments for civilian faculty at military academies
Military academies will no longer appoint civilian faculty to tenured positions as Hegseth says it can contribute to “academic stagnation.”
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Reposted by Dr. Fred J. Calef III
c0nc0rdance @c0nc0rdance.bsky.social · 30/09/2026
Qingshan Lake Water Forest in Lin'an District, Hangzhou is a viral attraction sometimes called "Matcha Lake" for the emerald green duckweed (subfamily Lemnoideae). These black swans (Cygnus atratus) & their cygnets are enjoying a nutritious buffet of aquatic plants. Let's learn about duckweed.
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Reposted by Dr. Fred J. Calef III
Daniel Álvarez @dalvarez-01.bsky.social · 30/09/2026
A Maya monument depicting a man and his wife carrying a hunted deer. Its unusual openwork design makes it very interesting. It is called Estela de Tabí. Seen at the Museo Regional de Antropología in Mérida. #Maya #Yucatan #Archaeology
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John Cassidy @earthquakeguy.bsky.social · 29/09/2026
Did you feel shaking in the #PugetSound region of #WA state at 2:05 p.m. PT today? That was a M4.2 #earthquake located ~40 km SW of Seattle. 1000's of people felt shaking, some as far away as Victoria and Vancouver in the north, and Portland in the south USGS: earthquake.usgs.gov/earthquakes/... ⚒️🧪
Seismograms showing ground shaking from the September 29, 2026 M4.2 earthquake near Seattle and Tacoma, WA. Map from the USGS showing felt shaking reports received for the M4.2 earthquake near Seattle and Tacoma on September 29 at 2:05 p.m. Some people felt shaking as far away as Victoria and Vancouver, British Columbia and Portland, Oregon.
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World Central Kitchen @wck.org · 30/09/2026
Update from WCK’s Yasmin in Nepal📍 The flooding in Nepal washed away several bridges across the Trishuli River. We met a group of residents operating a ropeway box to ferry people across. We distributed hot meals to these volunteers to sustain them while they help their neighbors. #ChefsForNepal
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Hourly Cosmos @hourlycosmos.bsky.social · 30/09/2026
AM 1229-512 - From Judy Schmidt (geckzilla.bsky.social) - flic.kr/p/2f7WRGY
A super faint edge-on disk galaxy, and somewhat of an enigma. How it formed like this and how its frontal morphology might appear are subject to speculation, but chances are if we saw it from a sufficiently inclined vantage point, it would be practically invisible beyond its nucleus, assuming what we see is spread out fairly evenly along the disk and not concentrated along some very skinny arms.

Anyway, I'm happy to simply enjoy yet another wonderful variation that nature has given us.

HST Proposal:
Establishing HST's Low Redshift Archive of Interacting Systems

All channels: ACS/WFC F606W

North is 16.50° counter-clockwise from up.
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Reposted by Dr. Fred J. Calef III
Veena Dubal @veenadubal.bsky.social · 30/09/2026
My son who thinks about fishing 24/7 caught 24 lbs of salmon—& filleted it in my kitchen. Everyone on our street is eating salmon, my house smells like salmon, my clothes smell like salmon, & my daughter just ran screaming to her room and slammed the door “salmon for dinner again?!!??!” 🎣🐟
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Reposted by Dr. Fred J. Calef III
Joe Mason @moreorloess.bsky.social · 30/09/2026
1937 air photo showing mining waste deposited in a fan along Ellis Branch, Galena River, with a DEM close-up of the fan remnants today. Note the corn in shocks in a field just south of the fan in the air photo.
Air photo showing mining debris around an old mine with a fine of sediment washed down into the adjacent stream valley. The mining debris is much lighter than surrounding areas.Shaded relief map covering part of the area of the air photo but zoomed in more. The fan of mining debris is still evident, though dissected.
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Reposted by Dr. Fred J. Calef III
Thierry St-Laurent Dion @tstld.bsky.social · 30/09/2026
Study of a Crow Ballpoint pen on paper #art #birds #nature #sciart
Study of a crow.  Made with a ballpoint pen and watercolor on paper.
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Reposted by Dr. Fred J. Calef III
Mark Hamill @markhamillofficial.bsky.social · 29/09/2026
It's inconceivable to me how someone who lost in a free & fair election can incite an angry mob to attack his own government, (the very definition of treason) & be allowed to run for any office ever again.
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Mineral Cup & Ore Cup @mineralcup.bsky.social · 30/09/2026
#MinCup26 Semifinal 2 It’s a match sure to break hearts between industrial powerhouses piezoelectric #quartz and lubricating #graphite! (With the correct links this time!) VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...
Split photo between a pair of glassy-clear terminated quartz crystals and flaky blades of dark grey graphite at odd angles to each other, with green crystals around them.
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Joe Mason @moreorloess.bsky.social · 30/09/2026
Bordner Survey map of late 1930s to early 1940s land use near New Diggings, Wisconsin, showing old lead mines mixed with cropland (C) and permanent (PP), though many areas of mined land are apparently not marked. Close-up of one of the mined areas that are marked, as seen with 1-m lidar DEM.
Map of land use from the 1930s, showing roads and many land parcels labeled with letter codes for land use or the word "mine."Lidar-based DEM showing a mined area with piles of debris and gullies.
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Vincent Ledvina @vincentledvina.bsky.social · 29/09/2026
Here it comes... the large coronal hole is almost directly facing Earth now, which means fast solar wind is 3-4 days away. In fact, NOAA SWPC has just issued a G1/minor storm watch for Oct 2. This means there are chances for mid-latitude auroral displays Thu and Fri nights. #heliophysics
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Justin Walsh @jstpwalsh.bsky.social · 30/09/2026
Shane Ross at Virginia Tech created a simulation of what 500k orbital data centers, as proposed by SpaceX, would look like from your home latitude sdross0.github.io/orbital-data...
sdross0.github.io
What would orbital data centers look like from your sky?
500,000 satellites from SpaceX's FCC filing, two published brightness models and the real stars, for any latitude, date and time. Computed in your browser.
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Reposted by Dr. Fred J. Calef III
darth™️ @darthbluesky.bsky.social · 30/09/2026
u can not convince me these are not orange popsicles left in the freezer for three years
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Mayor Zohran Kwame Mamdani @mayor.nyc.gov · 30/09/2026
Black text that reads:

229 new affordable homes are coming to the Bronx.

We just broke ground on Sol on Park:
• 80 homes for current NYCHA residents
• 69 homes for formerly homeless seniors
• 79 homes for low- and middle-income seniors
• 8,000 sq. ft. of community space, including a health and wellness center 

This is what’s possible when we invest in NYCHA and use the power of government to build a City where New Yorkers come first.
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Ruth Siddall @pavementgeology.bsky.social · 29/09/2026
Pentre Ifan #cromlech #dolmen #tombtuesday
A colour photo of the dolmen Pentre Ifan taken in the late afternoon A black and white photo of the dolmen Pentre Ifan taken on an overcast morning A colour photo of the dolmen Pentre Ifan taken mid morning. Me channeling Robert Smithson at Pentre Ifan
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Nature Portfolio @natureportfolio.nature.com · 30/09/2026
A swallowable paper battery that can power medical devices inside the body before breaking down has shown promise in preclinical research, including studies in pigs, according to research in Nature Chemical Engineering. go.nature.com/4drZQNo #medsky 🧪
This is figure 1, which shows a schematic illustration of a capsule-based biodegradable electronics system with an envisioned scenario for clinical use.
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James Davenport @jradavenport.com · 29/09/2026
Are you looking to apply for the Astronomy PhD program at the University of Washington this cycle? Please look at our website and see the new Expression of Interest form!! astro.washington.edu/graduate-adm...
astro.washington.edu
Graduate Admissions | Department of Astronomy | University of Washington
The Department of Astronomy is accepting applications to our graduate program for Fall 2027 admissions.
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Greg Sargent @gregsargent.bsky.social · 25/09/2026
Many thanks to @theunpopulist.net for reposting my piece on Stephen Miller’s Office of Remigration, which really needs more attention. This agency announces right in its name that white nationalism is the basis for US immigration policy: www.theunpopulist.net/p/stephen-mi...
theunpopulist.net
Stephen Miller Is Paying Monstrous Dictators to Admit Expelled Immigrants
A Democratic Congress needs to urgently investigate this abuse of taxpayer dollars that were actually meant for refugees
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Landru79 @landru79.bsky.social · 28/09/2026
#NASA's #Mars #Perseverance rover Front Left Hazard Avoidance Camera (Hazcam) Sol 1981 1987 1992 mars.nasa.gov/mars2020/mul... NASA/JPL-Caltech/j. Roger
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Hourly Cosmos @hourlycosmos.bsky.social · 28/09/2026
Phobos over Ascraeus Mons - NASA 's Viking 2 1977 - From Andrea Luck (andrealuck.bsky.social) - flic.kr/p/2oRhn1S
Download full size image: www.flickr.com/photos/192271236@N03/53066242230/sizes/o/ (License Below)

Credit:
NASA/JPL/AndreaLuck

Colourised image created using data processed from pds-imaging.jpl.nasa.gov/

Mission: VIKING ORBITER2 - EXTENDED_MISSION
Distance from Phobos: 8000 km
Orbit: 304 
Instrument: VISUAL_IMAGING_SUBSYSTEM_CAMERA_B
Time: 1977-06-23 T 11:17:04
Product ID: f304b88 (planetarydata.jpl.nasa.gov/img/data/viking/viking_orbiter...)

Notes from NASA: Viking 2 Orbiter image of Phobos orbiting over Ascraeus Mons on Mars. Phobos is about 8000 km below the spacecraft and 22 km across. Ascraeus Mons is 13,000 km away and about 300 km at its base, centered at 11 N, 104 W. North is at 11:30, and Phobos is moving from left to right relative to the surface.

Credit:
NASA/JPL/AndreaLuck

Feel free to share, giving the appropriate credit and providing a link to the original image or tweet: creativecommons.org/licenses/by/3.0/
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Hourly Cosmos @hourlycosmos.bsky.social · 28/09/2026
Mars - Dust Storm near the South Pole - CNSA Tianwen-1 - From Andrea Luck (andrealuck.bsky.social) - flic.kr/p/2pspkee
Full size image 8500x4790: www.flickr.com/photos/192271236@N03/53463679363/sizes/o/

Same region/same day from the point of view of Hope Mars Mission probe: flic.kr/p/2ptEvp6

Also same day Hope Mars Mission detected multiple dust storms in the Southern Hemisphere, take a look here: flic.kr/p/2oxtRbn

Credit
Raw Image Copyright: CNSA/CLEP/PEC/MoRIC
Image Processing: Andrea Luck

Image created using data processed from moon.bao.ac.cn

Mission: Tianwen-1
Region: South Polar Region
South on the right
Time: 2022-09-26T18:58:53
MoRIC Moderate Resolution Imaging Camera 
Mars Cordinate System: Long 164.030441 Lat -82.632718
Altitude: 295 km
Photo IDs (5 images):
HX1-Or_GRAS_MoRIC-F-0038_SCI_N_20220926185727_20220926185727_01649_A.2C
HX1-Or_GRAS_MoRIC-F-0039_SCI_N_20220926185747_20220926185747_01649_A.2C
HX1-Or_GRAS_MoRIC-F-0040_SCI_N_20220926185807_20220926185807_01649_A.2C
HX1-Or_GRAS_MoRIC-F-0041_SCI_N_20220926185830_20220926185830_01649_A.2C
HX1-Or_GRAS_MoRIC-F-0042_SCI_N_20220926185853_20220926185853_01649_A.2C

Credit
Raw Image Copyright: CNSA/CLEP/PEC/MoRIC
Image Processing: Andrea Luck
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Amy Rae Hill @amyraehill.bsky.social · 29/09/2026
Lots of color this commission round! 🌈
Inside of kiln, pottery covered in dusty white glaze Inside of kiln with colorful fired space pottery
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Just A Tinker 🟥🍁🟥 @john-gardi.bsky.social · 29/09/2026
On this day in space! Sept. 28, 1962: Canada's 1st satellite Alouette 1 launches into orbit from California on a Thor-Agena rocket
space.com
On this day in space! Sept. 28, 1962: Canada's 1st satellite Alouette 1 launches into orbit from California on a Thor-Agena rocket
Canada launched its first satellite in partnership with a new NASA before the Canadian Space Agency even existed.
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Perseverance Image Bot 📡 @persevereimgbot.bsky.social · 28/09/2026
Sol 1993: Left Navcam, acquired at 12:39:21.295 (local mean solar time)
An image taken by the Perseverance rover on Mars
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