One Pluto year equals 248 Earth years. At 1473 miles in diameter—about half the width of the United States—Pluto is the ...

The fundamental building blocks for planet formation can exist even in environments with extreme ultraviolet radiation, ...

As the most massive planet in the Solar System, and first to form, Jupiter’s gravity shaped the formation of everything else.

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

The White House's 2026 budget request axes NASA's long-held plan to bring Mars samples to Earth for analysis. Here's why that cancellation would be a mistake.