Tuesday, June 30, 2026

3I/ATLAS - not just the fastest object in our solar system, but the oldest

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I've previously written about 3I/ATLAS, a visitor from outside that arrived in our solar system last year - here and here .  Although i...
Thursday, March 26, 2026

What do subatomic particles look like?

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"What do subatomic particles look like?" sounds like a pretty basic question.  But, in fact, it is not.  Many physicists would con...
Monday, November 24, 2025

3I/alpha re-emerges from behind the Sun. But, is it an alien artifact?

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 The interstellar object (visitor from another sun) 3I/ATLAS has reemerged into view, after being hidden behind the sun.  It continues to at...
Tuesday, October 21, 2025

Antarctica - redux

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The  Lawrence Berkeley National Laboratory Engineering Division communications people have put out a nice story about  Thorsten Stezelberger...
Monday, August 11, 2025

Alien visitors, redux: Why are we seeing them now?

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 After my last post on 3I/ATLAS , an interested reader (full disclosure - my wife, Ruth Ehrenkrantz ) asked an interesting question: Why are...
Monday, July 21, 2025

Another alien visitor enters the Solar System

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 The Solar System recently welcomed another visitor from another star:  3I/ATLAS.  We don't know much about it yet, but it seems conside...
Sunday, May 4, 2025

Two slit interferometry – the fully quantum edition

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  Today, I want to write about something a bit different – a unique 2-slit interferometer (aka the double-slit experiment)...