Search
Ethan Siegel
Theoretical astrophysicist and science writer
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.
Read Less
If an AT-AT walker (or something even larger) wanted to walk across a frozen lake, how thick would the ice have to be? Each winter, one of the most spectacular phenomena […]
Observations have been ruined; scientific satellites with the right-of-way have had to alter course. Here’s a how-to guide to doing better. In any field of business or industry, the prevailing rule […]
In physics, anything that isn’t forbidden must occur. So why don’t the strong interactions violate CP-symmetry? If you ask a physicist what the biggest unsolved problem facing the field today […]
The Leonid meteor shower peaks today. Its parent comet taught us where meteor showers come from. Every year, as Earth regularly orbits the Sun, meteor showers repeatedly recur. While August’s Perseids […]
Even before MMA was a combat sport, it was a unique type of astronomy. Today, it’s opening up the Universe as never before. On February 24, 1987, a spectacular signal was […]
Helium and carbon are made copiously in the interiors of stars. But the in-between elements? They’re rarities everywhere. If you were to take every element in the periodic table and […]
For decades, one of the Big Bang’s greatest predictions was shrouded in doubt. The answer was always there on Channel 3. When it comes to the question of how our Universe […]
And if the data is good enough, we can determine that it’s accelerating directly, too, silencing the last remaining doubters. If you want to understand what the Universe is made […]
On May 9, 2016, the prior transit of Mercury occurred, and was photographed many times on a practically continuous basis by NASA’s Solar Dynamics Observatory. Transits of Mercury are rare, […]
A longstanding astronomical gap between neutron stars and black holes is finally coming to a close. Astronomy has taken us so far into the Universe, from beyond Earth to the planets, […]
When you hear ‘quantum,’ you probably think of splitting everything into discrete, indivisible chunks. That’s not necessarily right. If you want to learn what the Universe is made out of […]
A theoretical view of a distant world so far from our Sun that our Solar System appears barely brighter than the remaining stars in the sky. ( Caltech/R. Hurt (IPAC)) Pluto […]
It might seem puzzling, in a Universe bound by the speed of light, that this could be true. Here’s the science behind it. If you look out into the distant Universe, […]
Scientists actively researching this have known the answer for quite some time. It’s time for everyone to catch up. The Big Bang happened 13.8 billion years ago, and is generally regarded […]
There are a lot of unsolved mysteries in the Universe, but dark energy is the most confusing. Here’s why. The majority of the energy in our Universe went completely undiscovered until […]
Young galaxies are bright and blue; old galaxies are red and dead. So how did this old, red galaxy form so early? The observable Universe contains two trillion distinct galaxies, but […]
Many people, including some scientists, fear that the coming 5G WiFi revolution will harm humans. Here’s why that’s unfounded. Over the coming few years, a new set of infrastructure will […]
Forget about alien nonsense. The Universe as it actually is doesn’t need any embellishments to be interesting. In our Solar System, the planets, moons, asteroids, comets and other masses are […]
If you think about the way a gravitational wave detector works, you might encounter a paradox. Here’s the solution. One of the greatest scientific achievements in all of human history […]
100+ years ago, General Relativity came along, and Einstein gave the Universe a cosmological constant. Here’s why that was a mistake. Back in the 17th century, Isaac Newton put forth the […]