The location of the solar system's outer boundary is a point of contention among astronomers. There are three possible candidates, which "all have merit." But which one is best? When you purchase ...

Take, for example, the solar system. If you picture it in your head, you likely see the sun in the center and a retinue of planets orbiting it. At some point, perhaps around four billion to five ...

So exactly how many solar system moons have we found? The answer, it turns out, depends on your definition of a moon. But this is likely just "the tip of the iceberg," Edward Ashton, an astronomer ...

Is this all we’ll ever accomplish beyond the Solar System, a scattering of wayward probes sent out into the infinite night? For decades, scientists, engineers, and dreamers have worked to ...

Each of the outer solar system's giant planets is accompanied by ... space along fissures in its southern hemisphere — a sure sign of liquid water lurking just beneath the moon's thin, icy ...

If you were to look at a giant picture of space, zoom in on the Milky Way galaxy, and then zoom in again on one of its outer spiral arms, you’d find the solar system. Astronomers believe it ...

It was a missed opportunity. What was poorly communicated as a demotion was actually the discovery of new exciting members of our Solar System, of which Pluto was the first. The good news is ...

also appear along this same line. Why are they in a line? It's because the solar system is flat. I know, last week I outlined two experiments you can do to prove that the Earth is not flat.

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...

A recent study suggests a relationship between solar cycles and the atmosphere of the solar system’s eighth planet. By Robin George Andrews Each planet of the solar system has its own look.