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Universe Expansion
The biggest, brightest galaxies are the easiest to spot, but the tiniest ones teach us about how the Milky Way assembled and grew up!
5mins
Gravity defies quantum mechanics. What does that mean for a theory of everything?
The "Ring Nebula," known for almost 250 years, is so much more than a Ring. With JWST's capabilities, we're seeing more than ever before.
Life in the supremely vast cosmos is incredibly rare. We need a new vision for our living planet and for ourselves.
The Universe isn't just expanding, the expansion is also accelerating. If that's true, how will the Milky Way and Andromeda eventually merge?
Despite the vast number of planets in the Universe, Earth's specific evolutionary history guarantees that its life forms — including humans — are utterly unique.
The first observational evidence showing the Universe is expanding is 100 years old now: in 2023. Here's the story of its 100th anniversary.
9mins
Ever wonder what would happen if we got sucked into a black hole? Turns out we could live in it for a while — if it was big enough.
How fast is the Universe expanding? Two major methods disagree. New JWST data, just released, strengthens this Hubble tension even further.
Some constants, like the speed of light, exist with no underlying explanation. How many "fundamental constants" does our Universe require?
Two fundamentally different ways of measuring the expanding Universe disagree. What's the root cause of this Hubble tension?
The visible Universe extends 46.1 billion light-years from us, while we've probed scales down to as small as ~10^-19 meters.
How scientists are hearing the gravitational background "hum" of the Universe for the very first time.
Einstein's laws of gravity have been challenged many times, but have always emerged victorious. Could wide binary stars change all that?
From when its light was emitted, the El Gordo galaxy cluster might be the most massive object in all of existence. Here's how JWST sees it.
There are two types of missing, or "dark" matter: baryonic (made of normal matter) and non-baryonic. Have we finally found the normal stuff?
Nothing can escape from a black hole. So where do Hawking radiation, relativistic jets, and X-ray emissions around black holes come from?
Back in the 1930s, Fritz Zwicky postulated the existence of dark matter. No one took it seriously until Vera Rubin's work: 40 years later.
All stars, eventually, run out of fuel and die. Given all the stars we can see and the vast distance to them, are any of them already dead?
The hunt for the elusive particles continues.
We may be the last generation born not knowing if we are alone in the Universe.
Today, our observable Universe extends for 46 billion light-years in all directions. But early on in our history, things were much smaller.
The concept of the warp drive is currently at odds with everything we know to be true about physics.
For many years, cosmologists have claimed the Universe is 13.8 billion years old. A new paper says no, it's 26.7 billion. How do we decide?
What are supermassive black holes, how common are they, and how do they grow up throughout cosmic history? Listen and find out!
The space telescope's findings challenge the notion of a galaxy brimming with life.
From the present day all the way to less than 400 million years after the Big Bang, we're seeing how the Universe grew up like never before.
Some 55 million light-years away lies the giant galaxy Messier 87. Its supermassive black hole, inside and out, looks better than ever.
Headlines have blared that quasar ticking confirms that time passed more slowly in the early Universe. That's not how any of this works.