Starts With A Bang
Starts With A Bang, Big ThinkExplore the cosmos with astrophysicist and author Dr. Ethan Siegel! From the origin of everything to the fate of the universe, Ethan and Big Think are here to answer your biggest questions.
| Platform |  | Pricing | Only free issues | Publishes | Twice weekly |
|---|---|---|---|---|---|
| Issues | 139 | Subscribers | Read | startswithabang.substack.com |
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NASA’s next X-ray mission, AXIS, has been killed
This artist’s concept image of the Chandra X-ray Observatory is now 30 years old. Launched in 1999, Chandra remains humanity’s most powerful, highest-resolution X-ray observatory, and one of the original four NASA great observatories along ...
This galaxy shouldn’t exist
##### with Ethan Siegel • March 7, 2026
Can the Drake equation’s final term predict humanity’s demise?
While we’ve long envisioned and dreamed of a sustained human presence not only in space, but extending our civilization to other worlds and even other star systems or galaxies, the sobering fact remains that we don’t even know if there’s an...
A million servers in orbit
##### with Ethan Siegel • February 28, 2026
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The writers behind this newsletter.
Explore the cosmos with astrophysicist and author Dr. Ethan Siegel! From the origin of everything to the fate of the universe, Ethan and Big Think are here to answer your biggest questions.
Learn from the world's biggest thinkers.
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