Marshall Eubanks

Around here, the crow watch-birds (crow flocks always post watch-birds when they are eating) give a particular call when they spot eagles and _all_ the smaller birds go silent and disappear.

The Physics of Interstellar Travel Cambridge Core - Astronomy: General Interest - The Physics of Interstellar Travel

The Physics of Interstellar Travel
(coming soon)
www.cambridge.org/core/books/p...

or math.

I don't understand how anyone can watch how blatantly Grok is manipulated to answer the way ownership desires it to and then act like the other LLM chatbots couldn't possibly be similarly but less obviously compromised to produce responses in whatever way corporate interests and priorities dictate.

Insanely stupid and short-sighted choice. I didn't even know they were still trying to run this racket. You put more universities in danger with this shit you idiots!

On the left, this image shows SamCam, provided by the U of A to track the spacecraft’s sample head during its primary mission. The Y-shaped sample return capsule release mechanism is visible in the center in its deployed position. The OSIRIS-REx Laser Altimeter, provided by the Canadian Space Agency to create detailed 3D topographical maps of Bennu, is behind the release mechanism. To the right, one of the spacecraft's two navigation cameras, or NavCams, is visible.

NASA's OSIRIS-APEX just flew past Earth, making a course adjustment to asteroid Apophis in 2029. Apophis will come very close to us that year & could hit in the future.

OSIRIS-APEX will tell us a lot about Apophis...assuming the mission survives budget cuts. 🔭🧪

news.arizona.edu/news/osiris-...

Transporter-15 rideshare mission launches 140 payloads A Falcon 9 launched 140 payloads on its latest dedicated rideshare mission Nov. 28, ranging from European government spacecraft to a private astronomy satellite.

Transporter-15 rideshare mission launches 140 payloads

A Falcon 9 launched 140 payloads on its latest dedicated rideshare mission Nov. 28, ranging from European government spacecraft to a private astronomy satellite.

Incredible footage of volcanic eruption of a dormant volcano in Ethiopia from a commercial plane.

A sight seen for the first time in recorded history. ⌚

Here’s the text of the Northwestern settlement with the DoJ, which includes a $75 million financial component / payoff (cc @profmarkovic.bsky.social):

Well, it is hyperbolic - and moving so fast its trajectory is pretty straight.

Well, I don't think it's specific to hyperbolic trajectories, but this one is pretty straight, and that helps.

I think you need a fair amount of "heavy dust" (say, 1 mm size particles) _and_ the right view angles to see an antitail like this, which is why it is relatively rare.

The inner solar system today, Nov 28, 2025, showing our interstellar visitor 3I/ATLAS passing outside the orbit of Mars.

The solar system today, Nov 28, 2025, showing our interstellar visitor 3I/ATLAS also heading towards its closest approach to Earth. If you look from Earth towards 3I you can see why its ion tail (stretched away from the Sun) & anti-tail (along the orbit behind 3I) are separated.

Sorry, here is a reference
ui.adsabs.harvard.edu/abs/1974Icar...

And, no, I don't think it increases the chances of 3I / ATLAS being artificial.

There are two kinds of comet anti-tails, one a perspective effect and the other, a true anti-tail. The latter is thought to be from a relatively heavy dust particles emitted by the comet, say 1 mm in diameter, which drift slowly away.

You’re telling me the guy with a Deus Vult tattoo decided to kill everyone and let God sort them out?

3,842 airborne A320 family aircraft.

“Analysis... has revealed that intense solar radiation may corrupt data critical to the functioning of flight controls.

A significant number of A320 Family aircraft currently in-service which may be impacted.”

Currently ~3,000 airborne A320 family aircraft.

www.airbus.com/en/newsroom/...

🚨Airbus has just confirmed to me that this issue does indeed relate to single-event upsets, also known as bit flips🚨

Of course, this condition was first written up by Dr. Seuss, M.D., who wrote the classic review paper, On Beyond Zygomycosis, describing rare and unusual diseases requiring new letters of the alphabet.

The computer errors from outer space The Earth is subjected to a hail of subatomic particles from the Sun and beyond our solar system which could be the cause of glitches that afflict our phones and computers.

In 2022 I wrote a big feature about single-event upsets for BBC Future. Covers various possible examples (they're notoriously hard to prove)
Aircraft are much more exposed that tech at ground level.

The computer errors from outer space - BBC Future share.google/tvD5nUOpFRHa...

About ~20% of the time that I serve as a reviewer, I find big flaws and am then really surprised to find that the other reviewers just green lit with minimal comments. Colleagues of mine have reported similar experiences. Am forced to conclude that some large fraction of reviewers _simply don't_.

Holy fucking shit this is a *real* image from a *real* (presumably peer-reviewed) paper in [Nature] Scientific Reports.

How many people had to sign off on this figure?

The editor, one hopes, the reviewer(s)? The copy editor?

What had to happen for THIS to get published?

frymnblal is a medical condition so rare and unusual a new letter of the alphabet had be created to describe it. Twitter doesn't yet have this letter, so I have to approximate it here.

NASA Astronaut Chris Williams, Crewmates Arrive at Space Station - NASA NASA astronaut Chris Williams, accompanied by Roscosmos cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev, safely arrived at the International Space Station

Drei Raumfahrer auf der ISS angekommen. Damit jetzt zehn Besatzungsmitglieder an Bord der Raumstation. www.nasa.gov/news-release...

ESA Member States commit to largest contributions at Ministerial The largest contributions in the history of the European Space Agency, €22.1 bn, have been approved at its Council meeting at Ministerial level in Bremen, ...

"The Ramses mission, to be built on a tight schedule to intercept the asteroid Apophis on its close encounter with Earth in 2029 is funded, and will help to prepare for future potentially hazardous asteroids."

Congratulations and good luck to everyone on the Ramses team!
www.esa.int/About_Us/Cor...

Inherently unpredictable beam steering for quantum LiDAR Quantum LiDAR offers noise resilience and stealth observation capabilities in low-light conditions. In prior demonstrations, the telescope pointing was raster-scanned, making the observation direction...

Inherently unpredictable beam steering for quantum LiDAR arxiv.org/abs/2511.09089

Everyone (esp media) pay attention. In 2021 almost every Republican attacked the Biden administration and State dept for being too slow in approving Afghanistan special visas as Afghanistan fell.

Now they are attacking Biden for doing what they asked him to do.

Updates on the Non-gravitational Acceleration of 3I/ATLAS The non-gravitational acceleration of the interstellar object 3I/ATLAS is routinely updated by Davide Farnoccia on NASA’s JPL Horizons…

Thank you! I see Avi just posted again.

avi-loeb.medium.com/updates-on-t...

And we certainly shouldn't conclude this might be a helicopter among horses.