As we look to larger cosmic scales, we get a broader view of the expansive cosmic forest, eventually revealing the grandest views of all.

When you don't have enough clues to bring your detective story to a close, you should expect that your educated guesses will all be wrong.

Parallel universes are among the most profound notions in all of quantum physics. It's a compelling and fascinating idea, but is it true?

The Big Bang was hot, dense, uniform, and filled with matter and energy. Before that? There was nothing. Here's how that's possible.

Once you cross a black hole's event horizon, there's no going back. But inside, could creating a singularity give birth to a new Universe?

Our nearby Ring Nebula, with JWST's eyes, shows evidence for planet formation. Will the Sun eventually destroy, and then replace, the Earth?

Originally, the abundance of bright, early galaxies shocked astronomers. After 3 years of JWST, we now know what's really going on.

For over 50 years, it’s been the scientifically accepted theory describing the origin of the Universe. It’s time we all learned its truths.

Massive galaxy cluster Abell S1063, 4.5 billion light-years away, bends and distorts the space nearby. Here's what a JWST deep field shows.

A few physical quantities, in all laboratory experiments, are always conserved: including energy. But for the entire Universe? Not so much.

On Earth, our particle accelerators can reach tera-electron-volt (TeV) energies. Particles from space are thousands of times as energetic.

For decades, astronomers have claimed the Milky Way will merge with Andromeda in ~4 billion years. Here's why, in 2025, that seems unlikely.

Here in our Universe, time passes at a fixed rate for all observers: one second-per-second. Before the Big Bang, things were very different.

With stars, gas, and dark matter, galaxies come in a great array of sizes. This new one, Ursa Major III/UNIONS 1, is the smallest by far.

It took nearly 400,000 years, after the Big Bang, to first form neutral atoms. The imprints from that early time can now be seen everywhere.

The COSMOS-Web survey is now complete, combining JWST and Hubble infrared data. Its spectacular views show us the Universe as never before.

According to Stephen Hawking, spontaneously emitted radiation should cause all black holes to decay. But we've never seen it: not even once.

Perhaps no existential question looms larger than that of our ultimate cosmic origins. At long last, science has provided the answers.

The Hubble Space Telescope, launched in 1990, was originally seen as a colossal mistake. This one image, taken in 1995, changed everything.

"Asking the question of, "Where did the entire universe come from?" is no longer a question for poets and theologians and philosophers. This is a question for scientists, and we have some amazing scientific answers to this question."

25 years ago, our concordance picture of cosmology, also known as ΛCDM, came into focus. 25 years later, are we about to break that model?

The Kalam cosmological argument asserts that everything that exists must have a cause, and the "first" cause must be God. Is that valid?

The Universe is expanding, and individual, bound structures are all receding away from one another. How, then, are galaxies still colliding?

Since the dawn of history, humans have pondered our ultimate cosmic origins. Now in the 21st century, science has gone beyond the Big Bang.

"Asking the question of, where did the entire universe come from, is no longer a question for poets and theologians and philosophers. This is a question for scientists, and we have some amazing scientific answers to this question that have defied even the wildest of our expectations."

The CMB gives us critical information about our cosmic past. But it doesn't give us everything, and galaxy mapping can fill in a key gap.

There are only four super star clusters in all the Local Group: rarities today. Here's what the youngest, the just-discovered N79, shows us.

First discovered in the mid-1960s, no cosmic signal has taught us more about the Universe, or spurred more controversy, than the CMB.

Cosmic inflation, proposed back in 1980, is a theory that precedes and sets up the hot Big Bang. After thorough testing, is it still valid?

Scientists just viewed one of the tiniest, most isolated, lowest-mass galaxies ever found with JWST. Despite all odds, it's still growing.