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
What would energy without a particle to attach itself to even look like? “It is only through labor and painful effort, by grim energy and resolute courage, that we move on […]
Everything in the Universe today was compressed into a tiny volume. But how small was it? “The creation of something new is not accomplished by the intellect but by the play […]
If you think federal funding for science is expensive, wait until you see the cost of not funding it. “For me, it is far better to grasp the Universe as […]
It might be the nearest supernova humanity will ever see. What will happen when it goes off? “Without these supernova explosions, there are no mist-covered swamps, computer chips, trilobites, Mozart or […]
The answer lies billions of years in the past. “Dark matter or invisible element?You decide.” –Toba Beta When we look out at the luminous matter in the Universe — stars, galaxies, clusters of […]
What Hubble sees at its best is only a tease for what James Webb will deliver. “With the Hubble telescope and all the other things that are out there, I believe […]
If it was good enough for more than 75 years, why not once again? “The cosmic game changed forever in 1992. Before then, logic told us that there had to be […]
You know how bright the full Moon is. Well, from the Moon, how would the ‘full Earth’ compare? “I put up my thumb and shut one eye, and my thumb blotted […]
We claim it’s the leftover glow from the Big Bang, but where is this light actually coming from? “We are told to let our light shine, and if it does, we […]
If you heard about time crystals, be aware that they do exist. But learn what they mean. “Every particular in nature, a leaf, a drop, a crystal, a moment of time […]
For those who still don’t believe in global warming, the science has had it right for half a century now. “Greenhouse gases are the second most important factor for climate, after […]
When a quantum interaction happens, one interpretation leads to an infinite number of parallel Universes. Here’s how that could be true. “As an analogy one can imagine an intelligent amoeba with […]
When galaxy clusters merge together, they form the largest objects the Universe will ever create. “On a cosmic scale, our life is insignificant, yet this brief period when we appear in […]
Space is getting bigger, but atoms, humans, Earth and our Milky Way stay the same size. How is this possible? “The Universe is expanding the way your mind is expanding. […]
Your theory predicts something novel? How nice. But no one will pay you any mind unless you test it. “He who loves practice without theory is like the sailor who boards […]
Have you heard that life is unlikely around low-mass, red dwarf stars? It might be time to rethink that flawed conclusion. “Laws of nature mixed with evolutionary/historical contingencies allow for […]
There’s a lot to learn about other worlds, but you can’t learn it all without looking up. “One should not need a teleportation device to decide whether a newly discovered object […]
20 years before Sally Ride, Valentina Tereshkova set the bar. She’s still amazing after more than 50 years. “A bird cannot fly with one wing only. Human space flight cannot develop […]
With James Webb and WFIRST launching soon, the Universe can expect a revolution. But what will it look like? “For the first time we can learn about individual stars from near […]
The red planet once wasn’t so different from Earth. Here’s what happened. “Mars’ atmosphere is so thin, you do not need a lot of streamlining. By the time the ship […]
We take for granted how much the Moon does for Earth, but not all of the changes would be bad. “If we get rid of the moon, women, those menstrual cycles […]
A live-blog event of an incredible public lecture by a scientist on the inside of James Webb’s team. “The [James Webb] telescope is basically designed to answer the big questions in […]
The latest challenger to dark matter’s throne may not be so difficult to knock off, after all. This post was written by Sabine Hossenfelder. Sabine is a theoretical physicist specialized in […]
In 1987, the nearest supernova seen in nearly four centuries lit up Earth’s skies. Here’s what it looks like today. “When a star goes supernova, the explosion emits enough light to […]
If black holes lose information in an event horizon, then do we have a paradox with our cosmic horizon? “The history of astronomy is a history of receding horizons.” –Edwin Hubble […]
You may have heard of Laniakea, but don’t count on it being real. “It’s the gravity that shapes the large scale structure of the universe, even though it is the weakest […]
And England almost burned themselves down as a result. “When Benjamin Franklin inveted the lightning rod, the clergy, both in England and America, with enthusiastic support of George III, condemned it […]
But are any of these potentially Earth-like worlds actually inhabited? Here are the prospects. “It isn’t only the beauty of the night sky that thrills me. It’s the sense I […]
Phobos and Deimos may have had another, inner, much larger companion! “The larger inner moons fall back to Mars after about 5 million years due to the tidal pull of […]
If you don’t have pristine, dark skies, you might never connect to the Universe. But there’s hope. “Before we devised artificial lights and atmospheric pollution and modern forms of nocturnal entertainment […]