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.

F = ma fall up
From high school through the professional ranks, physicists still take incredible lessons away from Newton's second law.
A colorful, abstract scientific illustration with a central glowing sphere, circular patterns, and various lines and circles suggesting quantum connections or uncertainty data points, on a dark background with blue accents.
No matter what it is that we discover about reality, the fact that reality itself can be understood remains the most amazing fact of all.
gravitational wave effects on spacetime
With over 300 high-significance gravitational wave detections, we now have a huge unsolved puzzle. Will we invest in finding the solution?
Two glowing spheres, one red and one green, face each other in space with a wavy line of light—like a particle physics collision—connecting them against a speckled dark background reminiscent of the last collider’s discoveries.
Will we build a successor collider to the LHC? Someday, we'll reach the true limit of what experiments can probe. But that won't be the end.
A visual simulation of two objects orbiting and merging, distorting a red-orange grid representing spacetime—illustrating gravitational waves once thought to be the worst prediction in science.
The measured value of the cosmological constant is 120 orders of magnitude smaller than what's predicted. How can this paradox be resolved?
comet collide with earth
65 million years ago, a massive asteroid struck Earth. Not only did Jupiter not stop it, but it most likely caused the impact itself.
Two colorful, semi-transparent spheres, one blue and one red, represent a possible top quark bound state, toponium, surrounded by small particles inside a cloudy, circular enclosure.
Can the top quark, the shortest-lived particle of all, bind with anything else? Yes it can! New results at the LHC demonstrate toponium exists.