Mark A. Norris
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markanorris.bsky.social
Mark A. Norris
@markanorris.bsky.social
Astronomer, Educator, Traveller, Human, Mild cynic.
Loeb wrote a "white paper" to the UN suggesting they give him a billion dollars and control of all the worlds telescopes whenever he felt personally threatened by a rock or ice cube. That doesn't sound entirely in good faith.
November 11, 2025 at 10:21 PM
Less than the more prosaic explanations…
November 10, 2025 at 6:42 PM
Your best bet is here;

ui.adsabs.harvard.edu/search/fq=%7...

I have some videos on it as well.
Astrophysics Data System
A powerful, streamlined new Astrophysics Data System
ui.adsabs.harvard.edu
November 9, 2025 at 4:23 PM
Imagine how bad your engineers, ones capable of reaching other stars, have to be to build such bad thrusters.
November 9, 2025 at 12:33 PM
This is the process.
November 9, 2025 at 7:39 AM
There are a couple. This one goes over the 8 random things Avi doesn't understand:

youtu.be/y-oQ44pQdCU

Then this one covers what happens up to perihelion.

youtu.be/oX8vBXhFQ5o

I probably need to do another given he has gotten confused about not being able to see a tail in twilight.
3I/ATLAS: Does it Really Have 40% Chance It's Alien?
YouTube video by Mark Norris
youtu.be
November 8, 2025 at 10:46 PM
I made a video myself where I went through his 8 supposed pieces of evidence. I wasn’t impressed.

It’s shocking to see him torch a great reputation so comprehensively.
November 8, 2025 at 10:11 PM
Don’t rule out both.
November 8, 2025 at 10:02 PM
I'm glad it had the desired effect.

Sadly the cranks aren't as amused. :)
November 8, 2025 at 11:30 AM
Sure they are. Right until they ask about what the pay looks like in those places.
November 8, 2025 at 12:19 AM
Doesn’t that claim rely on his wildly wrong mass estimate as well?

He claims that it would lose 13% of its mass, and 13% of the very large mass he claims it has should be easily detected. But 13% of a mass that is 1000 or 10,000 times smaller presumably wouldn’t.
November 6, 2025 at 12:51 AM
We actually got enough clear ish patches to observe the moon and I even saw Saturn briefly.
November 5, 2025 at 11:16 PM
Absolutely. It’s far worse than even the Drake equation for uncertainty.

It doesn’t help that he got the mass wrong by a factor of 1000-10000 and for some reason thinks a higher mass makes a probe more likely. I guess physics doesn’t apply to aliens.
November 5, 2025 at 9:35 AM
Exactly. I originally thought it must be an artefact, sort of like the old hair streaks you'd get on the digitized photographic plates, it just seems too narrow, but I can just about see it in a megacam image.

It looks like it is probably in the background, but still is very cool.
November 5, 2025 at 12:38 AM
This is my favourite, a narrow stellar stream in NGC4341.
November 4, 2025 at 8:12 PM
It is possible. In fact it’s totally normal for comets.
November 4, 2025 at 5:53 PM
You mean it wasn't when he wrote a "white paper" for the UN asking them to take his self-named scale seriously, a billion+ dollars, and control of all the worlds telescopes?

arxiv.org/pdf/2510.01405
arxiv.org
November 2, 2025 at 4:33 PM
Guy comments on pictures released within hours of being taken complaining about lack of transparency.
November 1, 2025 at 11:22 AM