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Adams was infamously scooped when Neptune was discovered in 1846. His failure wasn’t the end, but a prelude to a world-changing discovery.

Since mid-2022, JWST has been showing us how the Universe grows up, from planets to galaxies and more. So, what’s its biggest find of all?

We know of stellar mass and supermassive black holes, but intermediate mass ones have long proved elusive. Until now.

Observations of an enormous cosmic structure, dubbed the “Big Ring,” seem to violate the Copernican principle.

Even after the first stars form, those overdense regions gravitationally attract matter and also merge. Here’s how they grow into galaxies.

The Hubble Space Telescope, 32 years after its launch, broke the all-time record for most distant star. It won’t do better.

After 15 years of monitoring 68 objects known as millisecond pulsars, we’ve found the Universe’s background gravitational wave signal!

The last 70 years have taken us farther than the previous 70,000. But can we accomplish more than creating a record saying, “We were here?”

Though a single measurement is not enough to definitively decide the debate, this is a major win for dark matter proponents.

Many galaxies really are ultra-distant, but some are just intrinsically red or dusty. Only with spectroscopy can JWST tell which is which.

So far, gravitational waves have revealed stellar mass black holes and neutron stars, plus a cosmic background. So much more is coming.

Even with only 12.5 hours of exposure time, James Webb’s first deep-field image taught us lessons we’ve never realized before.

Measurements of the acceleration of the universe don’t agree, stumping physicists working to understand the cosmic past and future. A new proposal seeks to better align these estimates — and is likely testable.

Professional astronomy images are the gold standard. But this Large Magellanic Cloud composite is the amateur community’s best image ever.

Pluto failed to meet the definition of a planet, but some astronomers think there might be a legitimate Planet 9 out there.

When the Hubble Space Telescope first launched in 1990, there was so much we didn’t know. Here’s how far we’ve come.

One newly discovered, ancient star has a composition unlike any other. Explaining its existence is already blowing astronomers’ minds.

SETI is no longer just a guessing game.

From black holes to dark energy to chances for life in the Universe, our cosmic journey to understand it all is just getting started.

Due to chaos, it was long thought that planets couldn’t stably orbit systems containing three stars. GW Orionis is the first counterexample.

Known as hypervelocity stars, we originally thought just one would be ejected every 100,000 years. The real number is much greater.

One book will gather all topics on the search for life in the Cosmos.

Once science operations begin for James Webb, we’ll never look at the Universe the same way again. Here’s what everyone should know.

The LHC has a long, productive life ahead of it. An upgraded version, called the “High Luminosity LHC,” will be available in 2028.

We knew we’d find galaxies unlike any seen before in its first deep-field image. But the other images hold secrets even more profound.

With launch costs dropping and enormous numbers of new satellites filling the sky, can’t we just do it all from space?

After decades of development, whether NASA’s Webb succeeds or fails all comes down to five critical milestones that are only days away.

The brightest gamma-ray burst ever observed, GRB 221009A behaved in unexpected ways that might help us understand how they occur.

For many, it was just a successful launch like any other. But for scientists around the globe, it was a victory few dared to imagine.

The smartest person in the world was Isaac Newton, a true polymath whose brilliance never has been, nor ever will be, surpassed.