Archive · 23 Nov 2025
Astronomers Discover Possible Primordial Cluster Beyond Neptune
Scientists found a group of icy objects far beyond Neptune.
They think this group might be very old, from when the solar system was first forming.
This discovery could help us understand how the solar system started.
Astronomers may have found evidence of a dense group of icy objects in the Kuiper Belt
This structure could be a 'primordial cluster', untouched since the solar system's formation
The discovery could provide insights into the early history and evolution of the Solar System
The Kuiper Belt is a thick, doughnut-like structure shaped by the gravity of giant planets like Neptune
Scientists still don't fully understand the structure of the Kuiper Belt
- Who
- A team of scientists from Princeton University, led by astrophysicist Aamir Siraj
- What
- Discovered a possible primordial cluster in the Kuiper Belt
- When
- The discovery was recently made and is still being reviewed
- Where
- In the Kuiper Belt, beyond Neptune's orbit
- Why
- To understand the early history and evolution of the Solar System
- Location
- Approximately 43 astronomical units (AU) from the Sun
- Size
- Millions of icy objects, some over 60 miles (100 km) across
- Age
- Potentially billions of years old
- Discovery Year
- 2021