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

So, how did Pluto's orbit end up this way? First, let's compare Pluto to Earth and other planets in the solar system. The dwarf planet's orbit has an eccentricity — how much it deviates from a perfect ...

The methane gas may constitute a rarefied atmosphere, or it may come from erupting plumes on Makemake’s surface.

Exoplanet hunters Christopher Watson and Annelies Mortier explain the long search for a 'twin Earth' capable of sustaining ...

Harvard professor Avi Loeb claims 3I/ATLAS could be an alien spacecraft. Arizona State University professor Steven Desch is ...

On October 6 1995, at a scientific meeting in Florence, Italy, two Swiss astronomers made an announcement that would transform our understanding of the universe beyond our solar system. Michel Mayor ...

When NASA’s Artemis astronauts land near the moon’s south pole, they may be stepping into a region that holds vital clues to ...

For almost a decade, astronomers have been searching for a ninth planet in the solar system. Recently, new evidence of ...

The results challenge claims that the climate risks posed by an individual fossil fuel project are negligible or cannot be ...

Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to ... . Every day on Earth, you experience weather. You feel the wind blowing and see ...

Space news in 2025 is just wild. Every week, it feels like something new is happening—Mars rovers sending back weird photos, ...

Pluto, the king of the underworld, was the ancient Romans' embodiment of death itself. Known as Hades in Greek mythology, ...