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

These types of exoplanets are some of the most common in our galaxy - but they've remained mysterious until now.

This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our ...

At a frigid -125 degrees Fahrenheit (-87 degrees Celsius), WD 1856+534 b is the coldest planet ever directly observed, ...

"How planets are born is an unsolved area of research," astrophysicist Daniel Price of Australia's Monash University told Newsweek.

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

Roman was similarly designed with a focused set of science goals, including exploring an uncharted region of exoplanet ...

Though they don't orbit around our sun, sub-Neptunes are the most common type of exoplanet, or planet outside our solar ...

Astronomer Eliza Kempton said that she had waited her "entire career" to peer into an atmosphere from this mysterious class ...

Why doesn’t our solar system have sub-Neptune exoplanets and what can they teach us about planetary formation and evolution?

Astronomers didn’t even know sub-Neptunes existed until NASA’s Kepler mission uncovered them over the past decade. Although a ...

Apr. 15, 2025 — A new study modeled the chemistry of TOI-270 d, an exoplanet between Earth and ... most common types of planets outside of our solar system, according to a new ...