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Asteroidien aktinoidit tarjoavat heille suojan sensoreiltamme.
The actinides in the asteroids protect them from our sensors.
Se on koteloitua plasmaenergiaa jonka ulkokuoressa on silikaatteja, aktinoideja ja hiilikondriitteja.
It is a mass of plasma energy contained within discrete boundaries by an outer covering of silicates, actinides and carbonaceous chondrites.