89．Outside the magnetosphere，blasting toward the Earth is the solar wind，a swiftly moving plasma of ionizedgases with its own magnetic field．

(倒装句：blasting toward the Earth is the solar wind…=the solar wind…is blasting toward the Earth)

在磁气圈的外围，太阳风暴——一个有着自身磁场、迅速移动的电离化气团构成的等离子体一极快地袭向地球。

解析：

主句： blasting toward the Earth is the solar wind

倒装结构，正常顺序为thesolar wind…is blastingtoward the Earth

修饰结构1：Outside the magnetosphere

修饰结构2：with its own magnetic field

从句：a swiftlymoving plasma of ionized gases

修饰结构1修饰整个主句

修饰结构2修饰从句中的ionized gases

从句是主句中solar wind的同位语从句