Whether Pluto is officially a planet is the least interesting thing about the runt of the solar system, astronomers will tell you 95 years after the discovery of the fascinating and sometimes ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

On the 95th anniversary of its discovery, Pluto remains one of the most beloved and enigmatic worlds in our solar system, ...

For decades, we believed there were nine planets in our solar system—until Pluto was reclassified in 2006. But what if ...

Pluto isn't alone—it's part of the Kuiper Belt with possibly hundreds of other planet-sized objects. Because Pluto hasn't ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Mercury is the most prone to divulging secrets, doing so swiftly and without discretion. Jupiter and Mars also struggle to ...

Last fall, the scientific community went into a minor frenzy. A hunk of interstellar material had been sucked into the ...

Uranus has the craziest tilt in your Solar System. Its tilt is about ninety-eight degrees. That means its north pole is ...

Read A sky chart showing Mars, Jupiter, Saturn, and Venus in a "planet parade." Credits: NASA/JPL-Caltech On most ...

Additionally, the collision process may explain how Pluto developed a subsurface ocean without requiring formation in the very early solar system, resolving a timing constraint that has troubled ...

For some bodies, like all of the planets of the solar system ... explain what Mercury's perihelion is doing without needing anything else in the system." Comet and asteroid perihelions Unlike ...