Paul Valentine
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pevalentine.bsky.social
Paul Valentine
@pevalentine.bsky.social
Professional Consulting Structural Engineer that enjoys the outdoors, mathematics, physics and learning.
Human impact on the environment doesn’t stop at Earth. This article shows how years of launches and abandoned satellites have filled orbit with debris fragments. We’ve created a growing pollution problem. Sustainable space is as essential as a sustainable planet.
phys.org/news/2025-12...
Space debris poses growing threat, but new study suggests cleanup is feasible
High up in Earth's orbit, millions of human-made objects large and small are flying at speeds of over 15,000 miles per hour. The objects, which range from inactive satellites to fragments of equipment...
phys.org
December 4, 2025 at 11:06 PM
www.theverge.com/news/837652/...

There is nothing we cannot mess up!
Satellites keep photobombing the Hubble telescope, and it’s getting worse
Overcrowded orbits are making astronomers’ jobs harder.
www.theverge.com
December 3, 2025 at 11:45 PM
Some of the simplest things have hidden insight. I never really thought about the fact that the number of elements in the Cartesian product of two sets is an area without geometry!
December 2, 2025 at 8:20 PM
Are we in the 'Solitude Zone' of the universe?

An exit strategy for theorists if no other technologically advance civilisation exists in the universe.
Are we in the 'Solitude Zone' of the universe?
Are we alone? It's one of the most basic questions of human existence. People have been trying to answer it for millennia in one form or another, but only recently have we gained the tools and…
phys.org
October 26, 2025 at 9:16 AM
I have a reason to celebrate grey hair ... it could be a defense!

Scientists launch $14.2 million project to map the body’s “hidden sixth sense” www.sciencedaily.com/releases/202...
Scientists launch $14.2 million project to map the body’s “hidden sixth sense”
Inside your body, an intricate communication network constantly monitors breathing, heart rate, digestion, and immune function — a hidden “sixth sense” called interoception. Now, Nobel laureate Ardem…
www.sciencedaily.com
October 25, 2025 at 11:35 PM
Logical inference from accepted truths leads to consistent reasoning. If two parties disagree then there is an error in their logic or no isomorphic map between their axioms. Is this true?
mathsight.co.uk/an-axiom-of-...
An axiom of disagreement - mathSight
Logical inference from accepted truths leads to consistent reasoning. If two parties disagree then there is an error in their logic or no isomorphic map between their axioms. Is this true? Can axiomatic systems used in mathematics help in understanding disagreements between groups of people. Aristotle : “Axiom is that which it is impossible to make
mathsight.co.uk
October 25, 2025 at 12:03 PM
My wife and I go out for dinner to our local restaurant. It gets us both away from distractions so that we can have some personal time together. But what about set theory!
mathsight.co.uk/restaurant-r...
A tale of a restaurant relation - mathSight
My wife and I go out for dinner to our local restaurant. It gets us both away from distractions so that we can have some personal time together. I am very lucky to have a wife that discusses abstract thoughts, particularly when it comes to the relation in the restaurant.As I am draughting the pages
mathsight.co.uk
October 19, 2025 at 9:49 PM
Thoughts about a restaurant relation in set theory. Mathematical structures are about more than numbers.
mathsight.co.uk/restaurant-r...
A tale of a restaurant relation - mathSight
My wife and I go out for dinner to our local restaurant. It gets us both away from distractions so that we can have some personal time together. I am very lucky to have a wife that discusses abstract thoughts, particularly when it comes to the relation in the restaurant.As I am draughting the pages
mathsight.co.uk
October 19, 2025 at 9:47 PM
Since my younger years I have been fascinated with gravity. What is it ... why ... It feels mysterious. When I first watched Star Wars, the impact of seeing a planet with the low frequency sound rumbling in the cinema oozed power.
mathsight.co.uk/a_motivating...
A motivating force … - mathSight
Since my younger years I have been fascinated with gravity. What is it ... why ... It feels mysterious. When I first watched Star Wars, the impact of seeing a planet with the low frequency sound rumbling in the cinema oozed power. It was like you could feel the massive planet through the screen. You
mathsight.co.uk
October 16, 2025 at 9:39 PM
Time runs more slowly for people traveling at constant velocity relative to your position! This sounds like science fiction. It's not. What's more, it's not too hard to demonstrate. #physics
mathsight.co.uk/time-dilation/
Time dilates! - mathSight
Time runs more slowly for people traveling at constant velocity relative to your position! This sounds like science fiction. It's not. What's more, it's not too hard to demonstrate. Outside of normal math, there is just one thing we need to know: Theorem 1 The speed of light is constant to all inertial observers. Imagine
mathsight.co.uk
October 11, 2025 at 8:38 PM
Logical inference from accepted truths leads to consistent reasoning. If two parties disagree then there is an error in their logic or no isomorphic map between their axioms.

Is this true?
mathsight.co.uk/an-axiom-of-...
An axiom of disagreement - mathSight
Logical inference from accepted truths leads to consistent reasoning. If two parties disagree then there is an error in their logic or no isomorphic map between their axioms. Is this true? Can axiomatic systems used in mathematics help in understanding disagreements between groups of people. Aristotle : “Axiom is that which it is impossible to make
mathsight.co.uk
October 8, 2025 at 9:55 PM
Thoughts about Newton when walking our dog on a windy day

The UK is experiencing Storm Amy. Its windy. Trees are swaying when we step out the door to walk our Black Labrador. This sparks thoughts about what generates motion.
mathsight.co.uk/windy-day-wi...
Windy day wind pressures. - mathSight
Thoughts about Newton when walking our dog on a windy day The UK is experiencing Storm Amy. Its windy. Trees are swaying when we step out the door to walk our Black Labrador. This sparks thoughts about what generates motion. I think back to my younger years learning Newton's Laws of motion. How simple they
mathsight.co.uk
October 6, 2025 at 12:10 AM
Shopping abstractions
Thoughts about simple abstractions in counting ...
open.substack.com
October 4, 2025 at 7:03 PM