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
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.
Less than the more prosaic explanations…
November 10, 2025 at 6:42 PM
Less than the more prosaic explanations…
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
Imagine how bad your engineers, ones capable of reaching other stars, have to be to build such bad thrusters.
This is the process.
November 9, 2025 at 7:39 AM
This is the process.
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.
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
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.
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.
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.
It’s shocking to see him torch a great reputation so comprehensively.
November 8, 2025 at 10:11 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.
It’s shocking to see him torch a great reputation so comprehensively.
Don’t rule out both.
November 8, 2025 at 10:02 PM
Don’t rule out both.
I'm glad it had the desired effect.
Sadly the cranks aren't as amused. :)
Sadly the cranks aren't as amused. :)
November 8, 2025 at 11:30 AM
I'm glad it had the desired effect.
Sadly the cranks aren't as amused. :)
Sadly the cranks aren't as amused. :)
Sure they are. Right until they ask about what the pay looks like in those places.
November 8, 2025 at 12:19 AM
Sure they are. Right until they ask about what the pay looks like in those places.
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.
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
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.
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.
We actually got enough clear ish patches to observe the moon and I even saw Saturn briefly.
November 5, 2025 at 11:16 PM
We actually got enough clear ish patches to observe the moon and I even saw Saturn briefly.
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.
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
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.
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.
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.
It looks like it is probably in the background, but still is very cool.
November 5, 2025 at 12:38 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.
It looks like it is probably in the background, but still is very cool.
This is my favourite, a narrow stellar stream in NGC4341.
November 4, 2025 at 8:12 PM
This is my favourite, a narrow stellar stream in NGC4341.
It is possible. In fact it’s totally normal for comets.
November 4, 2025 at 5:53 PM
It is possible. In fact it’s totally normal for comets.
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/pdf/2510.01405
arxiv.org
November 2, 2025 at 4:33 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/pdf/2510.01405
Guy comments on pictures released within hours of being taken complaining about lack of transparency.
November 1, 2025 at 11:22 AM
Guy comments on pictures released within hours of being taken complaining about lack of transparency.