Mercury is the smallest planet in our solar system. Explore its size, extreme temperatures, core structure, and comparison ...

Body-crushing pressure. Toxic atmospheres. Unbearable temperatures. That's what would be in store if you visited other planets in our Solar System.

The Solar System is far larger than the neat diagrams found in textbooks. Beyond the planets lies a vast region of icy debris ...

For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the ...

Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...

Six of the planets of our solar system will be aligned in February for a spectacular sky show. Here’s where and when you can ...

A planetary system 116 light-years from Earth has a peculiar pattern. It could flip the script on how planets form, scientists say.

Gas giants possibly developed slowly in the solar system. They developed cores layer by layer within a disk of ice and dust ...

A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.

Updated measurements from NASA’s Juno spacecraft could help researchers better understand the planet's mysterious interior, ...

Jupiter is the largest planet in our Solar System and the fifth planet from the Sun. It is a massive gas giant made mostly of hydrogen and helium, the same elements that form stars.

Every winter, skiers chase smooth carving turns, reliable snow and that dream run. As the Milano Cortina Winter Olympics 2026 unfold on Earth, it raises a fun question: if the Games ever leave our ...