古老的尘粒蕴含着太阳诞生的磁场线索

在流星雨或陨石中发现的微小尘粒，可能为太阳的形成提供了重要线索。这些尘粒记录了原恒星星云中的磁场状态，而地球及其他行星正是从中演化而来的。

Those little dust grains that fall to Earth during meteor showers or end up as part of larger meteorites found on Earth may hold surprising clues to the formation of the Sun. That's because they record the state of the magnetic field in the protostellar nebula from which Earth (and ultimately the planets) formed.