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Ethan Siegel

A theoretical astrophysicist and science writer, host of popular podcast "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.

Ethan Siegel Starts with a Bang!

Breaking the Speed of Light

Image credit: Matt Howard, Idaho National Laboratory / Argonne. It’s easier than you might think, and we’ve been doing it for over a century. “The doctors realized in retrospect that even […]

What is the Speed of Gravity?

Image credit: European Gravitational Observatory, Lionel BRET/EUROLIOS. Do changes in a gravitational field propagate instantaneously, at the speed of light, or at a different speed altogether? “The only problem with […]

Water in Space: What Happens?

Image credit: NASA / ESA, of Pedro Duque aboard the International Space Station. How one of the most interesting molecules on Earth behaves in the zero-gravity, zero-pressure environment of outer space. […]

The Stellar Story of Us

Image credit: NASA / JPL-Caltech, Hubble/Spitzer/Chandra composite; O. Krause et al. How the Universe made the elements and atoms that make up you and me, and everything else on Earth. “Things […]

Messier Monday: The Sunflower Galaxy, M63

Image credit: Doug H., via A beautiful spiral just outside the Big Dipper holds many secrets that can teach us about our own Milky Way! “If I were a flower.. […]

Weekend Diversion: Space Cats!

Image credit: Space Cats on twitter; The internet is really, really great… for cats. In space. “There are two means of refuge from the miseries of life: music and cats.”-Albert […]

All the Universe in one year

Image credit: NASA / CXC / M. Weiss. What the entire natural history of everything would look like compressed down into a single calendar year. “[D]on’t forget to make some art — write […]