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Posts by Sera Markoff

Video

Newest release of #Jupiter aurora from program 17408. Observation date 2025-10-17, but released a few days ago.
www.planetarylightshow.com/jupiter/prop...
Credit: Planetary Light Show

2 days ago 116 54 3 4

only my whole life...🙄

2 days ago 1 0 0 0
Screen shot of account name showing "Will be Markoff" instead of Sera Markoff

Screen shot of account name showing "Will be Markoff" instead of Sera Markoff

It always throws me when I look at my French Vélib account and the page auto-translate to English helpfully also 'translates' my name:

2 days ago 16 0 2 0
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👇👇

1 week ago 4681 1770 167 69
Impact Flash! - GEODES: Geophysical Exploration of the Dynamics and Evolution of the Solar System

Amateur astronomers with telescopes equipped with video cameras are requested to look for impact flashes on the Moon tonight, to coordinate with #ArtemisII observations. Details here: www.geodes.umd.edu/impactflash

2 weeks ago 234 123 6 10

The President of the United States is threatening to commit war crimes and wipe out a "whole civilization" — all because he started a disastrous war of his own making and had no plan and no strategy for how to end it.

This is abhorrent, and the American people do not support this.

1 week ago 47110 11557 2215 719
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Unexpected EHT intern alert!

This bird had gotten lost in the fog and appeared at the IRAM 30-m control room door- more than 1,500 meters above its usual habitat.

After a brief "internship," it was safely released back into nature the next morning.

#M87MOVIE

1 week ago 55 12 1 3

It is very easy to become accustomed to Trump’s ravings, and laugh them off. That’s a dangerous thing to do.

When Trump states: “A whole civilization will die tonight,” he is threatening to commit genocide.

We can’t allow that to happen. Congress must end this war NOW.

1 week ago 4796 1009 243 60

President Trump is threatening war crimes of horrific proportions against civilians.

It’s deranged. This madness must stop.

1 week ago 3402 624 980 183
Trump truth social post: A whole civilization will die tonight, never to be brought back again. I don't want that to happen, but it probably will. However, now that we have Complete and Total Regime Change, where different, smarter, and less radicalized minds prevail, maybe something revolutionarily wonderful can happen, WHO KNOWS? We will find out tonight, one of the most important moments in the long and complex history of the World. 47 years of extortion, corruption, and death, will finally end. God Bless the Great People of Iran!

Trump truth social post: A whole civilization will die tonight, never to be brought back again. I don't want that to happen, but it probably will. However, now that we have Complete and Total Regime Change, where different, smarter, and less radicalized minds prevail, maybe something revolutionarily wonderful can happen, WHO KNOWS? We will find out tonight, one of the most important moments in the long and complex history of the World. 47 years of extortion, corruption, and death, will finally end. God Bless the Great People of Iran!

Sickeningly evil. Donald Trump must be impeached. 

When will it be enough for my Republican colleagues to grow spines and remove him from office?

1 week ago 9814 1880 511 110
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The President is openly threatening massive escalation in Iran saying “a whole civilization will die tonight.”

Congress needs to vote to put a stop to this. It is a constitutional duty to vote on war powers and both sides should demand this.

1 week ago 2315 503 282 31

Regardless of whether it’s all talk, when the leader of our country expresses plainly genocidal intent, everyone has to do something.

For citizens of all political stripes, it means rejecting this madness. For Congress, it means taking action to rein him in. Now.

1 week ago 27754 6695 987 292

During this incredible, unifying moment of inspiring international cooperation and spectacular technological achievement, I would really appreciate it if the US president would stop threatening to murder an entire country with bombs.

2 weeks ago 5487 970 68 24

“Training the next generation of astronomers is critical to the future of our field. And building excitement about the practice of science by undertaking projects like this is a great way to ensure that curious-minded young learners can see themselves in astrophysics,” Ji concluded. 🫶🏻

2 weeks ago 12 4 0 0
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Anti-war demonstrations occurred all across Israel this evening. US media decided you really didn't need to know about them.

2 weeks ago 201 118 4 2
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NASA's Artemis II Live Mission Coverage (Official Broadcast) YouTube video by NASA

I highly recommend putting this NASA #Artemis II mission livestream on and just leaving it playing as you go about your weekend. Live views of the spacecraft, occasional visualizations of the current config, views of the control room, space-ground radio audio. www.youtube.com/live/m3kR2KK...

2 weeks ago 2067 696 49 51
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NASA just dropped this image of Artemis II astronaut Christina Koch looking back at us. The first woman to ever see our planet in its entirety. I’m not crying you’re crying 🥹🔭🧪 📸: NASA

2 weeks ago 36285 7609 340 339
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A crescent Earth against the black of space.

A crescent Earth against the black of space.

Some of the imagery coming down from the Artemis II crew is breathtaking...

2 weeks ago 882 146 20 7
A rust toned mosaic capturing a number of Martian rocks, captured April 2, 2026 (Sol 4854)

A rust toned mosaic capturing a number of Martian rocks, captured April 2, 2026 (Sol 4854)

Mastcam mosaic captured two days ago by Curiosity, on her way up the slopes of Aeolis Mons

🔍 viewer.gigamacro.com/view/rXLf44E...

Credits images: NASA/JPL-Caltech/MSSS/fredk

#Mars 🧪🔭

2 weeks ago 75 14 0 0
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Journey to the Moon - NASA Artemis II lifted off from Kennedy Space Center in Florida on April 1, 2026, and will reach the lunar sphere of influence—when the Moon's gravity exerts more force on the Orion spacecraft than the Ear...

FYI, this gallery has all the photos NASA is sharing from Artemis II in one place, with descriptions.

2 weeks ago 2100 1161 14 22

Separation of church and…oh nevermind

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A full disc image of Earth, as seen from the Orion Crew Module. The planet is a pale blue, swirling with white clouds and glowing slightly lighter blue in place from reflected light. At lower left, a large brown landmass is Africa, with Spain and Portugal with twinkling lights where the planet curves. At top right, auroras glow in a thin green glow, just barely separated from the planet's surface. Earth is set against the black of space (pic: NASA/R.Wiseman)

A full disc image of Earth, as seen from the Orion Crew Module. The planet is a pale blue, swirling with white clouds and glowing slightly lighter blue in place from reflected light. At lower left, a large brown landmass is Africa, with Spain and Portugal with twinkling lights where the planet curves. At top right, auroras glow in a thin green glow, just barely separated from the planet's surface. Earth is set against the black of space (pic: NASA/R.Wiseman)

More context on this #Artemis II image:

* This is the night side, lit by moonlight. You can see city lights in Spain & Portugal, & a sliver of day at lower right

* The Sun is entirely behind Earth, which makes it a kind of solar eclipse, but w/ Earth doing the eclipsing instead of the Moon:
☀️🌍🚀🌕

2 weeks ago 13118 3713 234 321
Taken by a camera on one of the European Service Module's solar arrays, white spacecraft, part of ESM  and Adapter Module, with the Moon at 250 735 km distance (pic: NASA)

Taken by a camera on one of the European Service Module's solar arrays, white spacecraft, part of ESM and Adapter Module, with the Moon at 250 735 km distance (pic: NASA)

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#Artemis II update: end of Flight Day 2, Orion is moving at 5632 km/h, 183 936 km from Earth and 244 298 km from the Moon. Taken by a camera on one of the European Service Module's solar arrays, the Moon at 250 735 km distance (pic: NASA). Graphic from nasa.gov/missions/art...

2 weeks ago 256 55 4 2

This is such an incredible photo of our planet, and drives home the need for us to protect this unique (so far) world (from ourselves)

2 weeks ago 6 0 1 0

This should be an ad for almost any other OS

2 weeks ago 7 0 0 0
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A Therapy Session with Sgr A* The nature of Sagittarius A* (Sgr A*) has been the subject of intense study and debate for over half a century. Herein, we present the first successful interview with an astrophysical object, explorin...

I love the April Fools posts on arXiv. Here's one on my favourite #blackhole! 🔭

arxiv.org/abs/2603.29963

2 weeks ago 6 1 0 0
Photo of a stage with crowds and Billy Bragg performing, also projected on a larger screen.

Photo of a stage with crowds and Billy Bragg performing, also projected on a larger screen.

Billy Bragg’s music was a big part of my teen years so seeing him live at the @togetheralliance.bsky.social march against the right, where he shouted out the bravery of my hometown Minneapolis, was incredibly meaningful ❤️💪

3 weeks ago 17 1 0 0
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We just heard they are estimating a half a million people on the march against the right here today!!

3 weeks ago 5 0 0 0
Photo of a group of smiling people in front of a large crowd at a big march against the right in London

Photo of a group of smiling people in front of a large crowd at a big march against the right in London

Black hole scientists against racism at the @togetheralliance.bsky.social March!

3 weeks ago 29 4 1 0

Hope to see some other 🧪🔭 folk tomorrow in London!! I didn’t see an ‘academic bloc’ so we’re just winging it!

3 weeks ago 9 0 0 0