Ethan Siegel

Ethan Siegel

A theoretical astrophysicist and science writer, host of popular podcast “Starts with a Bang!”

Ethan Siegel Starts with a Bang!

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.

Black and white image of a star field with one bright object in the center, indicated by a red arrow, believed to be the third interstellar object detected passing through our solar system.
First 'Oumuamua, then Borisov, and now ATLAS have shown us that interstellar interlopers are real. Here's what the newest one teaches us.
A crane lifts a large metal structure onto a white building at a construction site in a mountainous, arid area under clear blue sky.
The relic signal that first proved the Big Bang has been known and analyzed for 60 years. Join us at the frontiers of modern cosmology!
The CMB has long been considered the Big Bang's "smoking gun" evidence. But after what JWST saw, might it come from early galaxies instead?
Images show the planet Uranus. The left image highlights its bright rings, while the right image, captured by the James Webb Space Telescope, depicts surprising details of glowing rings and a cloudy atmosphere. Discover more wonders in our solar system with these stunning visuals.
Once every 12 years, Earth, Jupiter, Uranus, and Neptune all line up, opening a window for a joint mission. Our next chance arrives in 2034.
Infographic displays spacecraft names and missions around the Sun, planets, and moons, illustrating the current and planned science fleet exploring the Solar System.
Over the first half of 2025, the US has cut science as never before. This disaster for American science may be a gift to the rest of the world.
A dense field of distant galaxies and bright stars against a black background, as captured in a JWST early galaxies deep space telescope image.
Originally, the abundance of bright, early galaxies shocked astronomers. After 3 years of JWST, we now know what's really going on.
the night sky with stars and trees in the foreground.
Looking at a dark, night sky has filled humans with a sense of awe and wonder since prehistoric times. But appearances can be deceiving.