Scientists have identified fragments of a massive protoplanet, likely as large as the Moon or Mars, through the study of a rare meteorite found on Earth. This discovery offers fresh insights into the diversity of early planetary development in the solar system over 4.5 billion years ago.
- Angrite meteorite reveals minerals formed under extreme pressure.
- Parent body possibly as large as the Moon or Mars.
- Discovery paints new picture of early planetary evolution.
What happened
Over 4.5 billion years ago, a large protoplanet, possibly rivaling the Moon or even Mars in size, once orbited the young Sun. This ancient world met a violent end when it was shattered by a catastrophic collision in the chaotic early solar system. Pieces of that lost world eventually fell to Earth as meteorites, including one rare specimen found in the Sahara desert called Northwest Africa 12774.
Studying NWA 12774, scientists discovered unusual mineral components indicating it came from deep inside a large planetary body. The evidence points toward a protoplanet much larger than previously assumed for angrite meteorite sources — potentially several thousand kilometers in radius. This finding suggests that many such early massive worlds may have existed but were destroyed before modern planets fully formed.
Why it feels good
This discovery illuminates a hidden chapter of our solar system’s history, expanding our knowledge about the diversity of planetary formation paths. The meteorite's unique chemistry, especially the presence of aluminum-rich clinopyroxene formed under incredible pressure, challenges established ideas about the building blocks of rocky planets like Earth and Mars.
Unearthing evidence of this lost world offers a thrilling reminder of the dynamic and sometimes violent processes that shaped our cosmic neighborhood. It also opens exciting possibilities that other fragments from similar vanished worlds may still be waiting to be discovered, potentially reshaping planetary science further.
What to enjoy or watch next
Keep an eye on new research about angrite meteorites and other rare space rocks as scientists continue to analyze them for clues about the early solar system. Museums and planetariums often feature meteorite exhibits that help bring these distant cosmic events closer to home, offering fascinating insights into the origins of planets.
For those intrigued by planetary science and exploration, documentaries and science programs exploring the formation of planets and the solar system’s early days can provide enriching context. Following updates from institutions like the University of Colorado Boulder or journals focused on Earth and planetary sciences will also share ongoing discoveries in this evolving story.