The Universe is out there, waiting for you to discover it.
Our mission: to answer, scientifically, the biggest questions of all.
- What is our Universe made of?
- How did it become the way it is today?
- Where did everything come from?
- What is the ultimate fate of the cosmos?
For countless generations, these were questions without resolutions. Now, for the first time in history, we have scientific answers. Starts With A Bang, written by Dr. Ethan Siegel, brings these stories — of what we know and how we know it — directly to you.
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Featured
Why power generated through nuclear fusion will be the future, but not the present, solution to humanity’s energy needs.
It’s a strange idea to consider: that a tiny building block of matter, the atomic nucleus, holds the greatest potential for energy release.
And yet, it’s true; while electron transitions in atoms or molecules typically release energy on the order of ~1 electron-Volt, nuclear transitions between different configurations release energies a million times as great, on the order of ~1 Mega-electron-Volt.
Popular
From before the Big Bang to the present day, the Universe goes through many eras. Dark energy heralds the final one.
A wild, compelling idea without a direct, practical test, the Multiverse is highly controversial. But its supporting pillars sure are stable.
The surface and atmosphere is colored by ferric oxides. Beneath a very thin layer, mere millimeters deep in places, it’s not red anymore.
The first supernova ever discovered through its X-rays has an enormously powerful engine at its core. It’s unlike anything ever seen.
Just 13.8 billion years after the hot Big Bang, we can see 46.1 billion light-years away in all directions. Doesn’t that violate…something?
All Stories
NASA’s James Webb Space Telescope will truly usher in a new era of astronomy. If you want to find the very first galaxy of all, you have to understand not […]
The pendulum didn’t tick right when they brought it here: the start of a fascinating story. For nearly three full centuries, the most accurate way that humanity kept track of […]
If you think life on Earth is hard, wait until you see Mars. If you think life on Earth is hard, try living on Mars. Mars, as photographed from the surface […]
There was a time in the Universe before we formed stars. Here’s how we’re exploring it. When we look out at the Universe today, we see that it’s full of […]
There was less than a 2 second delay between gravitational waves and light, but that’s incredibly meaningful. There’s an important rule in relativity that — as far as we know — all objects must […]
Just because something’s unlikely doesn’t mean that anything’s wrong. In our quest to understand the Universe, theoretical physics is perhaps the most powerful tool we have as far as making […]
Quantum physics just keeps getting weirder, even as it gets more fascinating. “Is it a wave or is it a particle?” Never has such a simple question had such a […]
The Big Bang started it all. And then we realized there was more. Of all the questions humanity has ever pondered, perhaps the most profound is, “where did all of this […]
The Universe is dark, but the distorted light reveals its presence. When we look at the objects in the Universe, the mass just doesn’t add up. A galaxy that was […]
It likely isn’t the rare occurrence we once thought it was. In our Solar System, there’s one overwhelming source of mass that all the planets orbit around: our Sun. Each planet […]
If there are cracks in Einstein’s theory, this is how to find them. Is Einstein’s most powerful theory, General Relativity, always correct? Or will there come a point where it breaks […]
It’s fundamentally different from space. Here’s how. Here’s a question that most of us have been asked at some point in our lives, “what’s the shortest distance between two points?” By […]
When one group says “A” and another group says “B,” consider that everyone might be wrong. One of the biggest enemies of scientific truth is the setup of a false dichotomy. […]
The rings are raining down onto the planet, and disappearing surprisingly fast. 4.5 billion years ago, our Solar System first formed. Protoplanetary disks, which all solar systems are thought to […]
They’re one of the brightest windows into our Universe’s star-forming past. When we look out at the galaxies in the Universe, almost all of them have supermassive black holes at […]
As the Universe ages, will it eventually fade away entirely? The earliest signal we’ve ever directly detected from the Universe comes to us from shortly after the Big Bang: when […]
Don’t miss the summer’s greatest natural sights of all. Some of the natural highlights of our night sky are easy to overlook. Every year, you’ll hear about some of the brightest, […]
Everything is being driven apart. But there’s hope of reaching what’s currently so far away. For the first 7.8 billion years, the Universe unfolded exactly as scientists would have expected in […]
There could have been life on Mars in the past, but that’s only the beginning of the story. For as long as humanity has been watching the skies, we’ve been fascinated […]
It comes from a supernova seen just 33 years ago, and it doesn’t pulse. 33 years ago, a supernova occurred just 168,000 light-years from Earth. This new image of the supernova […]
Some of them may have formed just 200 million years after the Big Bang. When we look out at the Universe, we’re not seeing objects as they are today, but rather […]
Research is for the experts. Listen to them instead. “Research both sides and make up your own mind.” It’s simple, straightforward, common sense advice. And when it comes to issues like […]
There are exposed planetary cores orbiting stars, and we may have already found them. When we take a look at the planets in our Solar System, there’s a pretty clear difference […]
It doesn’t have to be a science-fiction dream. For as long as human beings have been watching the night sky, we’ve dreamed of visiting other worlds and truly seeing what’s […]
Catch Saturn at its biggest and brightest, and view its rings while you still can. Right now, in Earth’s skies, Saturn appears at its biggest and brightest. A view of tonight’s […]
How can we save humanity from ourselves? In this life and this Universe, there will always be questions beyond the capabilities of humanity to answer. There’s so much that we’ve […]
The history of the Universe is forever imprinted in our own bodies. We can learn a lot about the history of the Universe just by looking at each of our own […]
There’s a boundary to how far back we can observe everything that exists. Despite everything we’ve learned about our Universe, there are many existential questions that remain unanswered. We don’t know […]
How quickly is it expanding today, and how does that expansion rate change over time? What is the Universe made of? How quickly is it expanding today, and how does that […]
Our galactic home in the cosmos — the Milky Way — is only one of two trillion galaxies in the observable Universe. Our galactic home in the cosmos — the Milky Way — is merely one among the […]