Author Archives: Thor

Recovering Old Digital Images

Posted on 2024-11-08 by Thor

I’d like to relate how I was able to find those old stereo pair images from thirty years ago.  As an early enthusiast of personal computers, I acquired habits of saving data “early and often”, because computers crashed and memory systems … Continue reading →

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The Universe in 3D

Posted on 2024-11-08 by Thor

I always had a mild interest in astronomy, and it became a strong interest in the 1990s, triggered by a homework assignment given to my ten-year-old son to go out at night and identify some constellations.  I took him away from … Continue reading →

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Twins Paradox- References

Posted on 2024-08-28 by Thor

Twin paradox, by Dr Don Lincoln of Fermilab (very unsatisfying, very unusual for Dr Lincoln, but maybe it will work for you). Twin paradox: the real explanation Twin paradox: the real explanation (no math) Sabine Hossenfelder This is the best … Continue reading →

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So is Acceleration Responsible?

Posted on 2024-08-28 by Thor

The symmetry argument made in the twins paradox is now broken, but what is it about those non-inertial events that prevents us from considering the separate legs of space travel—away and back, as two independent segments of a single inertial … Continue reading →

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The Twins Reunite

Posted on 2024-08-28 by Thor

At this point, Ben stops to take his samples and make measurements and survey the exoplanet.  He spends a year doing this, but he is no longer moving away from Amelia.  Their clocks are each ticking at the same rate.  … Continue reading →

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Spacetime and Worldlines, Ben’s Outbound Trip

Posted on 2024-08-28 by Thor

I think I can present this topic without math, but I will rely heavily on the visual tool of spacetime diagrams.  Spacetime is the hybrid combination of space and time.  It might sound abstract and scary, but it is really … Continue reading →

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The Twins Paradox – Introduction

Posted on 2024-08-28 by Thor

The Melting Watch, Salvador Dali, 1954 When I was studying physics in college, one of the early subjects was Einstein’s special relativity theory.  The subject is called “relativity” because it explains the physics of objects moving relative to each other.  … Continue reading →

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And now for something completely different.

Posted on 2017-09-29 by Thor

Sometimes, when I try to describe to others what I do as a color scientist, I am asked if I can fix their photos.  Usually it is to make their printer look more like their monitor, but a few years … Continue reading →

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Eddington epilogue

Posted on 2017-09-07 by Thor

I was lucky to have ended up at this observing location with such excellent weather. When planning to view total eclipses, I am advised to arrange for other activities as well; the eclipse itself is subject to fickle viewing conditions … Continue reading →

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Discussion

Posted on 2017-09-07 by Thor

It is a bit disappointing to be unable to show a clear gravitational signal, even with all of the successful exposures that were taken, but I recognized the difficulty of this measurement early on. In addition to the variables I … Continue reading →

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