Our Solar System, a sprawling collection of planets, moons, asteroids, and comets bound together by the Sun’s gravity, has long been thought to hold hidden secrets beyond Neptune. Planet Nine ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner ...

A team of astronomers says it has identified a single, slow-moving infrared object that checks all the right boxes for it being the long-theorized ninth planet lurking beyond Neptune. The hunt for ...

Scientists may have just spotted Planet Nine — a massive object orbiting 700 AU from the Sun. Data from two space telescopes ...

But there may yet be another world lurking beyond Neptune — and astronomers ... objects that led to the prediction of Planet Nine. “Whether it is real or not, it is 100 percent NOT Planet ...

Now, astronomers claim to have discovered this ninth planet after identifying signals that could indicate a planet far beyond ...

Apr. 15, 2025 — A new study modeled the chemistry of TOI-270 d, an exoplanet between Earth and Neptune in size, finding evidence that it could be a giant rocky planet shrouded in a thick ...

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

New views of TOI-421 b by JWST gives insight into how the most common type of planet in the galaxy might form.