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

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

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.

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

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

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

The James Webb Space Telescope viewed Neptune, our Solar System's final planet, for the first time. Here's what we saw, and what it means.

Some microbes can withstand Earth's most inhospitable corners, hinting that life may be able to survive similarly extreme conditions on other worlds.

The recently discovered Oort cloud comet, Bernardinelli–Bernstein, has the largest known nucleus: 119 km. Here's what it could do to Earth.

65 million years ago, a massive asteroid struck Earth. Not only did Jupiter not stop it, but it probably caused the impact itself.

In all of human history, only 5 spacecraft have had the right trajectory to exit the Solar System. Will they ever catch Voyager 1?

Can two planets stably share the same orbit? Conventional wisdom says no, but a look at Saturn's moons might tell a different story.

Do you think you know the Solar System? Here's a fact about each planet that might surprise you when you see it!

A Harvard astronomer went to the bottom of the ocean, claiming he recovered alien technology. But what does the science actually indicate?

In our Solar System, even the two brightest planets frequently align in our skies. But only rarely is it spectacularly visible from Earth.

Despite being the closest planet to the Sun, Mercury "only" reaches 800 °F at its hottest. Venus is always hotter, even at night.

Finding a tiny planet around bright stars dozens or hundreds of light-years from Earth is extremely difficult.

This oddball system of three stars might be our best chance at finding nearby life in the Universe.

It could cut the time needed to reach Mars in half.

Earth is the Solar System's only known inhabited planet. Could Venus, if its phosphine signal is real, be our second world with life?

The giant impact theory suggests our Moon was formed from proto-Earth getting a Mars-sized strike. An exoplanet system shows it's plausible.

The outer planets' clouds hide the weirdness within.

The classic picture of Jupiter's great rocky core might be entirely wrong.

Based on the atoms that they're made out of, the innermost planet should always be the densest. Here's why Earth beats Mercury, hands down.

Water is vital for life. Luckily for spacefaring humans, the solar system is full of it.

The secret ingredient is violence, and it just might indicate that "moonmoons" aren't as uncommon as most astronomers think.

Ever wonder what would happen if we got sucked into a black hole? Turns out we could live in it for a while — if it was big enough.

Like Mars today, Venus used to be a sci-fi superstar. Recent discoveries could re-ignite our interest in Earth’s “evil twin.”

Chemical changes inside Mars' core caused it to lose its magnetic field. This, in turn, caused it to lose its oceans. But how?

The odds are slim, but the consequences would be literally world-ending. There really is a chance of a black hole devouring the Earth.