Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the discovery of Pluto in the 1930s. Labeled as planet X, prominent astronomers ...

Astronomers have used NASA's James Webb Space Telescope to find strong evidence for a planet orbiting a star in the triple system closest to our own sun. At just 4 light-years away from Earth, the ...

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the discovery of Pluto in the 1930s. Labelled as planet X, prominent astronomers ...

Astronomers are closing in on what looks like a colossal missing piece of the Solar System, a giant planet that appears to lurk far beyond Neptune and tug subtly on everything around it. The suspected ...

As the number of exoplanet detections has breached 6,000 and continues to grow, scientists are finding a wide variety of ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. This artist’s concept shows what the gas giant orbiting ...