"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a ...

Planet X, also called Planet Nine, is a hypothetical planetary body seven times the mass of Earth lurking behind Pluto. If ...

The Sun, the planets, and all else that constitutes the solar system are hurtling toward the star Lambda Herculis, some 370 ...

The potential discovery of a large planet beyond Neptune’s orbit could change everything we know about the Solar System.

The spacecraft first flew over the planet's cold and dark night side before transitioning to the sunlit northern regions.

Imagine setting off on a road trip that doesn’t just take you through charming towns, but through an entire solar system – ...

"The data that will come down from the spacecraft will be fresh information about a place that we, as humanity, have never ...

The close-up images reveal craters, the floors of which are in permanent shadow, and vast sunlit northern plains.

19, 2024 — Scientists have unveiled groundbreaking research on the origins of lunar water, offering insights that could reshape our understanding of the Earth-Moon system and the broader solar ...

NASA's Parker Solar Probe flew closer to the Sun than ever before. It traveled at 430,000 mph, making it the fastest ...

Some stargazers are calling it a planetary parade: Every other planet in our solar system can be seen in the sky tonight.

A powerful X1.8 solar flare erupted on January 4, 2025, and was recorded at its peak—7:48 a.m. ET—by NOAA’s Solar Ultraviolet ...