A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

Astronomers are investigating a potential hidden planet, dubbed Planet Y, far beyond Neptune. Its gravitational pull is ...

With water being so important to life on Earth, scientists often look for it on exoplanets. But some of those worlds might ...

A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on?

High above the Sun’s blazing equator lie its mysterious poles, the birthplace of fast solar winds and the heart of its ...

Brian Cox debunks the 'alien probe' theory for interstellar comet 3I/ATLAS. Learn the scientific truth about its ancient ...

This long-duration comet will make its closest approach to Earth this fall, before disappearing into the outer solar system ...

A planetary scientist who has participated in analog missions describes their value for planning space exploration – and ...

Comet C/2025 A6 (Lemmon) is this year’s brightest comet visible from Earth—an icy relic from the solar system’s origins that ...

Interstellar comet 3I/ATLAS, a 7.5-billion-year-old visitor from the early galaxy, is offering scientists a rare glimpse into ...

The universe is truly magical: vast, mysterious, and endlessly fascinating. There’s something almost unreal about being able ...

We're just weeks away from this interstellar visitor reaching its brightest in Earth's night skies. Will we see it?