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Ethan Siegel
Theoretical astrophysicist and science writer
Ethan Siegel is a Ph.D. astrophysicist and author of "Starts with a Bang!" He is a science communicator, who professes physics and astronomy at various colleges. He has won numerous awards for science writing since 2008 for his blog, including the award for best science blog by the Institute of Physics. His two books "Treknology: The Science of Star Trek from Tricorders to Warp Drive" and "Beyond the Galaxy: How humanity looked beyond our Milky Way and discovered the entire Universe" are available for purchase at Amazon. Follow him on Twitter @startswithabang.
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With the observation of SN 2025wny, a lensed superluminous supernova, astronomy's future comes into sharp, exciting focus.
It takes a wide variety of processes in the Universe to make all the elements that populate space today. We're still discovering new ones!
As technology advances, more opportunities for cheating arise. Large language models aren't posing a new problem; they're how students cheat themselves.
Science isn't absolute. Its truths and discoveries enable us to approximate reality, but we must always remain open-minded to revisions.
The method you use to measure the expanding Universe determines which of two answers you'll get. Lensed supernovae can't resolve that issue.
Scientific truths remain true regardless of belief. These 10, despite contrary claims, remain vitally important as 2025 draws to a close.
Some vital, key ingredients must be in place for the Universe to make more matter than antimatter. The LHC took us one step closer in 2025.
As the lightest baryon in the Universe, the proton is thought by many to be eternally stable. But if it isn't, can we observe it decaying?
Finding alien Earths requires seeing Earth-sized planets at Earth-like distances from Sun-like stars. A new discovery completes the roadmap.
With a waning Moon and a denser-than-ever debris trail, 2025's Geminids might be the year's best meteor shower, and 2026's could be amazing.
We have a picture of how and when it will all come to an end. These three big ideas could still profoundly change how our cosmos evolves.
Science has assembled an incredible story outlining our Universe's whole history. Despite its unrivaled success, 9 profound gaps remain.
There are so many problems, all across planet Earth, that harm and threaten humanity. Why invest in researching the Universe?
Although American Thanksgiving only comes once a year, the scientific rules that make our Universe possible are always worth appreciating.
The far side of the Moon is incredibly different from the Earth-facing side. 66 years later, we know why the Moon's faces are not alike.
Such massive, early supermassive black holes have puzzled astronomers for decades. At last, we've finally figured out how they form.
Every observation out into deep space is also a look back in time.
One side of the Moon always faces us: the near side. The "dark side" of the Moon began as a mere metaphor, but today, science can weigh in.
Spirals, ellipticals, and irregulars are all more common than ring galaxies. At last, we know how these ultra-rare objects are made.
Wavelengths stretch, distances grow, and temperatures cool as the Universe expands with time. How are the various cosmic parameters related?