No civilization, no matter how successful, can last forever. What does the non-detection of intelligent aliens mean for our own longevity?

The discovery of CDG-2, a galaxy that's more than 99.9% dark matter, could reveal a new population of ultra-faint galaxies. But is it real?

Thanks to modern tech, Earth is now considered a ‘detectable’ planet. Astrophysicist Sara Seager explains how this idea can lead us to discovering life elsewhere in our universe.

No human has ever left the Solar System, and only six already-launched spacecraft will ever exit it. Will Voyager 1 remain the most distant?

Quantum entanglement links information between particles across space and time. So what happens when one of them falls into a black hole?

Forget about the terawatt lasers we're making on Earth. The Universe makes natural ones thousands of times more powerful than the Sun.

Even space and time are relative in Einstein's universe. That means our old notions of "where" and "when" no longer apply on cosmic scales.

One big goal of science is to find an inhabited, Earth-like planet. But if we find an Earth-like world, will we even recognize it?

Military satellite research brought us GPS. Astronomers influenced medical imaging tech. What would be invented after we discover alien life? Professor Sara Seager explains the consequences of such a groundbreaking discovery.

The Universe is expanding, the expansion is accelerating, and some galaxies even recede faster-than-light. Can we see a change in real time?

Before Sun-like stars die, they transition from AGB red giants into preplanetary nebulae. Here's how Hubble sees the famous Egg Nebula.

No claim has even made it halfway up the Confidence of Life Detection (CoLD) scale, but 21st century science is just beginning to unfold.

Here in our modern Universe, it's cosmic dust that forms planets, complex molecules, and enables life. But how did the Universe create it?

13.8 billion years have passed since the Big Bang, but many stars will survive for longer than that. What's the longest-lived a star can be?

Astronomer Jill Tarter explains why SETI is really about technology, patience, and learning how to tell alien signals from our own.

Even at its faintest, Venus always outshines every other star and planet that's visible from Earth, and then some!

Many collaborations have used JWST to take deep-field images: some wider and some deeper than others. Here's how it can surpass them all.

30 years ago, we didn’t know other stars had planets orbiting them. Now, we may be on the verge of finding Earth’s Twin. Sara Seager explains.

The Universe formed stars, galaxies, and even galaxy clusters extremely early on in our cosmos. This new marvel is one more JWST surprise.

Just like animals, galaxies often have bizarre, unusual, or even unique properties. But finding many, all at once, really does raise alarms.

"In the process of mapping the heavens, it doesn't take long to realize the data problem they generated."

Our view of the world, the Universe, and ourselves can change with just one glimpse of what's out there. It's happened many times before.

Outer space begins just over 100 kilometers up, but what we can see extends for billions of light-years. Here's what all of it looks like.

Even in an expanding Universe, we expect both redshifted and blueshifted galaxies. But nearly every one we see is redshifted. Here's why.

The Sun often produces solar flares and coronal mass ejections, but a rare solar radiation storm made the 2026's first great auroral show.

With unprecedented resolution, wavelength sensitivity, and light-gathering power, JWST reveals our cosmos like no other observatory ever.

Gravitational lenses arise when foreground masses and background light sources properly align. Einstein rings are rare, but crosses abound.

The VENUS survey isn't about planets at all, but about finding multiply-lensed supernovae. The ambition? To save the expanding Universe.

US science is worth fighting for, but so are the science projects and scientists denied opportunities. Here are 4 paths all worth exploring.

Back in 1604, Johannes Kepler discovered the Milky Way's last naked-eye supernova. Here's how NASA's Chandra sees it over the 21st century.