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Cosmology
From the Big Bang to dark energy, knowledge of the cosmos has sped up in the past century — but big questions linger.
It is a story with nebulous beginnings and no discernible end.
The secret ingredient is violence, and it just might indicate that "moonmoons" aren't as uncommon as most astronomers think.
Generations ago, cosmologists asserted that the Universe might not just be the same in all directions, but at all times. But is that true?
A fascinating 90 minute podcast between Dr. Ivanna Escala and Ethan Siegel on Starts With A Bang!
The answer to the age-old philosophical question of whether there is meaning in the Universe may ultimately rest upon the power of information.
John Templeton Foundation
5mins
Why does time move forward but not backward? Physicist Sabine Hossenfelder explains.
From the earliest stages of the hot Big Bang (and even before) to our dark energy-dominated present, how and when did the Universe grow up?
19 years ago, the Bullet Cluster provided an empirical proof for dark matter. Even today, modified gravity still can't explain it.
Many people out there, including scientists, claim to have discovered a series of game-changing revolutions. Here's why we don't buy it.
The Universe isn't as "clumpy" as we think it should be.
The Universe certainly formed stars, at one point, for the very first time. But we haven't found them yet. Here's what everyone should know.
3mins
Left–Right, Back–Forth, Up–Down. What’s the fourth dimension?
Along with gravitational lensing and ALMA's incredible long-wavelength spectroscopy, JWST is reshaping our view of the early Universe.
7mins
How the Big Bang gave us time, explained by theoretical physicist.
There might be a hard limit to our knowledge of the Universe.
In Einstein's relativity and the Standard Model, we only have three spatial dimensions. But there could be more, and many think there are.
One study suggested that the "Methuselah Star" is older than the Universe itself.
"Once quantum mechanics is applied to the entire cosmos, it uncovers a three-thousand-year-old idea."
Most globular clusters appear to form their stars all at once, but there are exceptions. JWST just observed how "second formations" happen.
Human beings are tiny creatures compared to the 92 billion light-year wide observable Universe. How can we comprehend such large scales?
JWST has seen more distant galaxies than any other observatory, ever. But many candidates for "most distant of all" are likely impostors.
Most of us have heard that the Sun is an ordinary, typical, unremarkable star. But science shows we're actually anything but average.
Though a single measurement is not enough to definitively decide the debate, this is a major win for dark matter proponents.
Yes, dark energy is real. Yes, distant galaxies recede faster and faster as time goes on. But the expansion rate isn't accelerating at all.
As time goes on, dark energy makes distant galaxies recede from us ever faster in our expanding Universe. But nothing truly disappears.
Since dark matter eludes detection, the mission will target sources of light that are sensitive to it.
Ever since the Big Bang, cataclysmic events have released enormous amounts of energy. Here's the greatest one ever witnessed.
