China's astronomers solve 25-year mystery of PMOs in deep space
- Posted on February 27, 2025
- By The China Daily
- 1 Views
China's astronomers solve 25-year mystery of PMOs in deep space
Deep in space, mysterious wanderers roam freely — of planetary masses yet not hosted by stars. These celestial nomads, called planetary-mass objects (PMOs), have baffled astronomers since their discovery in 2000. How were these cosmic orphans born?
