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.
In terms of the planets we've discovered, super-Earths are by far the most common. What does that mean for the Universe?
On the largest scales, galaxies don't simply clump together, but form superclusters. Too bad they don't remain bound together.
At a fundamental level, nobody knows whether gravity is truly quantum in nature. A novel experiment strongly hints that it is.
We frequently say it's 2.725 K: from the light left over all the way from the Big Bang. But that's not all that's in the Universe.
Even though no human has stepped foot on the Moon's surface in 50 years, the evidence of our presence there remains unambiguous.
There are two fundamentally different ways of measuring the Universe's expansion. They disagree. "Early dark energy" might save us.
The first supernova ever discovered through its X-rays has an enormously powerful engine at its core. It's unlike anything ever seen.
The Solar System isn't a vortex, but rather the sum of all our great cosmic motions. Here's how we move through space.
Some stars burn through their fuel as expected, and die of natural causes. But others, instead, get murdered. Here's their story.
With advanced laser technology and an appropriate sail, we could accelerate objects to ~20% the speed of light. But would they survive?
Particle physics needs a new collider to supersede the Large Hadron Collider. Muons, not electrons or protons, might hold the key.
From before the Big Bang to the present day, the Universe goes through many eras. Dark energy heralds the final one.
Known as primordial black holes, they could thoroughly change our Universe's history. But the evidence is strongly against them.
For many, it was just a successful launch like any other. But for scientists around the globe, it was a victory few dared to imagine.
Even with leap years and long-term planning, our calendar won't be good forever. Here's why, and how to fix it.
A wild, compelling idea without a direct, practical test, the Multiverse is highly controversial. But its supporting pillars sure are stable.
Developing an awareness of and an appreciation for science is what we all truly need, not what we've been doing.
We know it couldn't have began from a singularity. So how small could it have been at the absolute minimum?
We don't know with 100% certainty where SARS-CoV-2 first came from or how it first infected humans. But not all options are equally likely.
With launch, deployment, calibration, and science operations about to commence, here are 10 facts that are absolutely true.
When three wise men gifted baby Jesus with gold, frankincense, and myrrh, they had no idea one was made from colliding neutron stars.
The photometric filters for the Vera Rubin Observatory are complete and showcase why they are indispensable for astronomy.
Life arose on Earth very early on. After a few billion years, here we are: intelligent and technologically advanced. Where's everyone else?
How can you "touch the Sun" if you've always been inside the solar corona, yet will never reach the Sun's photosphere?