Archive · 18 Nov 2025
Sun's Birth Cluster: A New Study on Its Siblings and Departure
The Sun had brothers and sisters when it was born.
They all moved away from each other, and sometimes their gravity messed up their planet-making stuff.
A new study looked at far-away objects in our solar system to figure out how many Sun siblings there were and how peaceful their separation was.
The Sun was not born alone and had several siblings.
These stars moved on separate paths and eventually drifted apart.
Their intense gravity disrupted proto-planetary systems, leaving marks on the solar system's edge.
A study by Amir Siraj's team at Princeton University examined 'distant sednoids' to understand the Sun's birth cluster and departure.
The Sun's departure was not too rough, as indicated by the alignment of distant sednoids.
- Who
- The Sun and its sibling stars
- What
- Moved away from each other, disrupting proto-planetary systems
- When
- Billions of years ago
- Where
- In the Sun's birth cluster
- Why
- To understand the Sun's birth and departure
- Number of Sun's siblings
- Several
- Distance of distant sednoids
- Beyond 400 AU
- Study team
- Amir Siraj's team at Princeton University
- Sun's departure
- Not too rough, as indicated by sednoids' alignment