Data from the Pan-STARRS-1 observatory in Hawaii has already narrowed down where Planet Nine may be hiding. (Image credit: Rob Ratkowski / Harvard Center for Astrophysics) Unfortunately, ...

When most of us left school there were still 9 planets – but we’ve come a long way since Pluto’s demotion. Here’s what’s next on the space agenda. The Solar System used to have nine planets.

NASA/Getty Images. Pluto’s fate was almost certainly sealed the day Eris was discovered in 2005. Like Pluto, Eris orbits the outskirts of our solar system. ... Is there a Planet Nine out there?

These are the sharpest images yet of planets being born around distant stars. Sharmila Kuthunur. Wed, April 30, 2025 at 4:30 PM UTC. 3 min read.

It’s been 18 years since Pluto’s celestial status was called into question—yet the matter seems far from settled. We asked experts from both sides to make their case. This 2015 NASA image of ...

Snapshots of the dynamical evolution of a stellar cluster with 200 stars. Credit: Nature Astronomy (2025). DOI: 10.1038/s41550-025-02556-0 ...