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

Researchers have found a candidate for the hypothetical Planet Nine, which could be an undiscovered giant planet way out in ...

Scientists examined infrared space surveys to narrow down candidates for Planet 9. Planet 9 would be so far from the Sun that ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

An astronomer breaks down 3 key components that allow researchers to make groundbreaking discoveries – and decide when ...

There's disappointment for astronomers as the newly-discovered bright green comet appears to have disintegrated ...

Observations of exoplanets typically provide astronomers little more than an orbit, a mass and a radius. If the radius and ...

The careening star blasted through the galactic filament, known as "the Snake," at a zippy 1–2 million miles per hour.

What's more, no exoplanets with emission spectra cooler than 275 K (1.85 °C; 35.33 °F) - comparable to Earth - have been ...

Webb discovered an early cosmic boom of "red monster" galaxies, surprising even seasoned researchers who thought they knew ...