Jupiter Shaped the Delivery of Life-Essential Elements to Early Earth

Published in Science Advances, the study utilizes geochemical models and meteorite analysis to reconstruct the movement of elements over 4.5 billion years ago. Researchers compared iron meteorites, which originated from the oldest planetesimals, against chondrites, which formed two to three million years later. By mapping the phosphorus-to-nitrogen ratios across these generations, the team demonstrated a distinct shift in material distribution triggered by the formation of Jupiter.

Initially, material flowed outward, creating higher phosphorus-to-nitrogen ratios in the outer solar system. As Jupiter grew, its massive gravitational influence acted as a barrier, preventing further exchange between the inner and outer zones. Consequently, the second generation of planetesimals in the inner solar system retained a unique chemical signature that matches the composition of Earth today. Senior author Rajdeep Dasgupta of Rice University noted that Jupiter’s growth history was critical in determining the availability of these ingredients for habitable worlds. Lead author Debjeet Pathak concluded that Earth acquired its inventory of life-essential elements primarily from local, inner-system sources, challenging previous assumptions about the necessity of contributions from outer-system chondrites.