Tom Murphy

Tom Murphy is a professor emeritus of the departments of Physics and Astronomy & Astrophysics at the University of California, San Diego. An amateur astronomer in high school, physics major at Georgia Tech, and PhD student in physics at Caltech, Murphy spent decades reveling in the study of astrophysics. For most of his 20 year career as a professor, he led a project to test General Relativity by bouncing laser pulses off of the reflectors left on the Moon by the Apollo astronauts, achieving one-millimeter range precision. He is also co-inventor of an aircraft detector used by the world’s largest telescopes to avoid accidental illumination of aircraft by laser beams.

Murphy’s keen interest in energy topics began with his teaching a course on energy and the environment for non-science majors at UCSD. Motivated by the unprecedented challenges we face, he applied his instrumentation skills to exploring alternative energy and associated measurement schemes. Following his natural instincts to educate, Murphy is eager to get people thinking about the quantitatively convincing case that our pursuit of an ever-bigger scale of life faces gigantic challenges and carries significant risks.

Both Murphy and the Do the Math blog changed a lot after about 2018.  Reflections on this change can be found in Confessions of a Disillusioned Scientist.

Note from Tom: To learn more about my personal perspective and whether you should dismiss some of my views as alarmist, read my Chicken Little page.

Lava fountain

Ditching Dualism #2: Animism

Rather than being a religion, animism is a mindset that had common purchase around the globe prior to modern times. Not only is it important to appreciate how we used to be when the planet’s ecological relationships were more “normal,” but it offers a worthy alternative to dualism that has much overlap with an astrophysical perspective.

December 3, 2025

Mindful dualism

Ditching Dualism #1: Exaltation

It is important to start this process recognizing that all these marvelous attributes of the universe as we find it are still awe-inspiring even from a different starting point. In fact, my own experience is that it all becomes rather more incalculably stupendous as a result of shifting away from a dualist perspective.

November 26, 2025

Buzz Lightyear

Space Case

It’s not news that many in our culture are violently allergic to the notion of limits (and then we all die of limitations). Maybe fear of death is another key driver for space fantasy, but let’s not get into that just now.

November 24, 2025

A reflected window on space camp.

Space as a Window

In the last five years, my journey has produced significantly new perspectives (for me) which only serve to make the space delusion more strikingly fascinating and revealing. At this point, it’s hard to identify a phenomenon that so completely captures the religion of the day and its unhinged basis.

November 12, 2025

plane stunt

When Space Becomes Silly

The question, then, is: when will we collectively become comparably dismissive of proposals for humans in space?

November 5, 2025

Biosphere 2

Biosphere Theatrics

In the case of biosphere replicas, how could any artificial environment possibly compete with the infinitely-superior and time-tested home we already enjoy on the planet to which we are both adapted and permanently grounded?

October 29, 2025

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