Ethan Siegel
Science Writer at Freelance
Host at Starts With A Bang podcast
"Some blogger who doesn’t even write a single paper in a decade." #Cosmology Science writer, astrophysicist, author, communicator. He/him or they/them.
Articles
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1 day ago |
medium.com | Ethan Siegel
Is the Universe’s expansion rate 67 km/s/Mpc, 73 km/s/Mpc, or somewhere in between? The Hubble tension is real, and not so easy to resolve. There’s a mystery over how quickly the Universe is expanding, and it doesn’t appear to be going away anytime soon. Back in the early 2000s, after decades of astronomers arguing over whether the expansion rate of the Universe was closer to 50 km/s/Mpc or 100 km/s/Mpc, the Hubble Key Project was completed.
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1 day ago |
bigthink.com | Ethan Siegel
Travel the universe with Dr. Ethan Siegel as he answers the biggest questions of all. Out there in the Universe, there are both discoveries just waiting to be made and cosmic puzzles just waiting to be solved. We have an incredibly robust picture of our cosmos, at present.
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2 days ago |
medium.com | Ethan Siegel
The ANITA experiment found cosmic rays shooting out of Antarctica. One interpretation claims “parallel Universes,” but is that right? For some of us, the idea of parallel Universes sparks our wildest dreams. If there are other Universes where certain events had different outcomes — where just one crucial decision went a different way — perhaps there could be some way to access them.
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2 days ago |
bigthink.com | Ethan Siegel
Travel the universe with Dr. Ethan Siegel as he answers the biggest questions of all. The Universe we know today, filled with stars and galaxies across the great cosmic abyss, hasn’t been around forever. Despite the fact that there are several trillions of galaxies visible to us, spanning distances of tens of billions of light-years, there’s a limit to how far away we can look.
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3 days ago |
medium.com | Ethan Siegel
Different methods of measuring the Universe’s expansion rate yield high-precision, incompatible answers. But is the problem robustly real? One of the greatest discoveries in all of modern science was that of the expanding Universe. It led us to the notion of the Big Bang, gave us insight into our cosmic origins and ultimate fate, and helped us ultimately discover the unexpected existence of dark energy.
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You can’t do your own research without doing your homework first Nearly everyone who claims to "do their own research" isn't conducting research at all. Most of them haven't even done their homework, and that's a huge part of the problem. https://t.co/s8GI69wojJ
JWST captures its most extreme gravitational lens ever Hubble previously viewed galaxy cluster Abell S1063, finding swirling, distorted lensed galaxies. With a JWST deep field of that same region, you won't believe what we saw. https://t.co/iNYoCbAmFf
Is the Hubble tension a real problem? #AskEthan Famed astronomer Wendy Freedman claims (including in an interview with me) that the Hubble tension may not be real. A large suite of evidence, rebutting many of her claims, suggests otherwise. https://t.co/gc7osVrAyd