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The structure of our Solar System has been known for centuries. When we finally started finding exoplanets, they surprised everyone.

Finding life beyond our Solar System requires understanding its host planet.

From the coldest planets to spacecraft that have exited the Solar System, these little-known facts stump even many professional astronomers.

The detection of two celestial interlopers careening through our solar system has scientists eagerly anticipating more.

From size to mass to density and more, each world in our Solar System is unique. When we compare them, the results are truly shocking.

Get ready for the most peculiar road trip that will help you understand the vastness and emptiness of the solar system — and Sweden.

For now, our Solar System’s eight planets are all safe, and relatively stable. Billions of years from now, everything will be different.

The existence of another watery world in the outer solar system may offer clues to how such seas form — and hope for another spot to search for life.

Out beyond Neptune are some fascinating bodies left over from our Solar System’s formation. Could one of them truly be spectacular?

Here in our Solar System, we only have one star: a singlet. For many systems, including the highest-mass ones, that’s anything but the norm.

Valles Marineris is the Solar System’s grandest canyon, many times longer, wider, and deeper than the Grand Canyon. What scarred Mars so?

Watching for changes in the Red Planet’s orbit over time could be new way to detect passing dark matter.

In the early stages of our Solar System, there were three life-friendly planets: Venus, Earth, and Mars. Only Earth thrived. Here’s why.

Straddling the bounds of science and religion, Newton wondered who set the planets in motion. Astrophysics reveals the answer.

The Earth that exists today wasn’t formed simultaneously with the Sun and the other planets. In some ways, we’re quite a latecomer.

Back in 1990, we hadn’t discovered a single planet outside of our Solar System. Here are 10 facts that would’ve surprised every astronomer.

It is humanity’s biggest step yet into the Solar System.

It took 9.2 billion years of cosmic evolution before our Sun and Solar System even began to form. Such a small event has led to so much.

From inside our Solar System, zodiacal light prevents us from seeing true darkness. From billions of miles away, New Horizons finally can.

Out of the four rocky planets in our Solar System, only Earth presently has plate tectonics. But billions of years ago, Venus had them, too.

There are 40 billion billion black holes in the universe. Here’s how our Solar System stacks up against ten of them.

Massive objects like black holes, stars, and rogue planets routinely pass near our Solar System. An ensuing comet storm could destroy us.

Newborn stars are surrounded only by a featureless disk. Debris disks persist for hundreds of millions of years. So when do planets form?

It would get rid of our hazardous, radioactive, and pollutive waste for good, but physics tells us it’s a losing strategy for elimination.

Finding alien technology on the seafloor would be truly incredible. This extraordinary claim, however, is debunked by the actual evidence.

Our cosmic home, planet Earth, has been through a lot over the past 4.5 billion years. Here are some of its most spectacular changes

NASA’s Juno mission, in orbit around Jupiter, occasionally flies past its innermost large moon: Io. The volcanic activity is unbelievable.

Harvard astronomer Avi Loeb claimed to track down and find alien spherules on the ocean bottom. Here’s the sober truth.

Comet A3, also known as Comet Tsuchinshan-ATLAS, has sprung to life since 2024’s last equinox. Here’s how to catch the show for yourself.

As Uranus approaches its solstice, its polar caps, rings, and moons come into their best focus ever under JWST’s watchful eye. See it now!