The curious minds at What If explore what it would mean for life on Earth if every planet in our solar system were habitable.

Exoplanets—planets that orbit stars beyond our solar system—have transformed our understanding of the universe. Since the ...

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

Warmer climates than Earth’s could accelerate life’s development, potentially increasing the number of planets with more ...

Stars don’t just form planets—they may also re-supply their disks with gas, reshaping how and where planets emerge.

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Flower Mound, Texas, was named one of the best places to live in the U.S. The James Webb Space Telescope has peered into the ...

Mar. 17, 2025 — A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system, according to a new ... Webb Telescope Captures Its ...

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto the old heave-ho and demoting it to a dwarf planet) and now researchers say they’ve found a ...