The entire star system was bombarded with intense radiation, and only those lifeforms most able to withstand the bombardment survived.

整个星系饱受强烈辐射，只有最能经受辐射的物种幸存了下来。

youdao

X-rays and gamma rays that Eros gives off in response to bombardment by solar and cosmic radiation.

ECONOMIST: An erotic encounter

And water would be all the more exciting on Ganymede because it is the largest moon in the solar system (larger even than the planets Mercury and Pluto) and, like earth, it has a permanent magnetic field that protects part of its surface from bombardment by certain sorts of life-destroying radiation.

ECONOMIST: Blue moon