小行星飞越展现古老碰撞家族史
In the asteroid belt between Mars and Jupiter, a spacecraft recently examined a middle-sized asteroid. The probe was on its way to outer planets and used the flyby to test instruments and collect data. Such flybys are not only technical rehearsals but also chances to uncover unexpected details about these ancient celestial bodies.
As the spacecraft glided by, its cameras captured detailed images showing an elongated, potato-shaped object. Measurements indicated that the asteroid spins very slowly, completing one rotation over many hours. These features are typical of fragments produced in violent collisions, rather than objects that formed gently from dust. The slow spin and irregular shape hint that this asteroid is a survivor of a catastrophic event.
Inspired by Scientific American reporting · Rewritten by Vocabsavvy · Vocabsavvy Original (inspired-by attribution)