Archive · 23 Aug 2025
Scientists Propose Planet Y Exists in Our Solar System
Scientists think there might be a hidden planet, called Planet Y, in our solar system.
It would be about the size of Earth and located far beyond Neptune.
This planet's gravity could be tilting the paths of icy objects in a region called the Kuiper Belt.
Researchers believe Planet Y might have been pushed outwards during the early formation of our solar system.
The new Rubin Observatory might be able to find Planet Y and help us learn more about our solar system.
Researchers propose an Earth-sized planet, dubbed Planet Y, may exist in our solar system.
Planet Y is theorized to be smaller than Planet Nine and closer to the Sun.
The planet's gravity might explain unusual orbital tilts of Kuiper Belt objects.
The Vera C. Rubin Observatory could help in the potential detection of Planet Y.
Planet Y may have formed elsewhere and moved to its current location.
- Who
- Amir Siraj, Christopher F. Chyba, Scott Tremaine, and Jonti Horner are key researchers.
- What
- Scientists suggest an Earth-sized planet, named Planet Y, could exist in our solar system.
- When
- The study was recently published and discussed.
- Where
- Planet Y is theorized to exist far beyond Neptune, in the outer solar system.
- Why
- Planet Y's existence is proposed to explain unusual orbital tilts in the Kuiper Belt.
- Planet Name
- Planet Y
- Size
- Between Mercury and Earth
- Location
- Beyond Neptune
- Potential Cause of Tilt
- Planet Y's Gravity
- Observatory Involved
- Vera C. Rubin Observatory