In 1937, the first radio telescope was built, enabling astronomers to detect otherwise invisibleradiation from stars.
1937年，第一架射电望远镜落成，让天文学家能够检测到从恒星发射的不可见辐射。
2
They wear white, full-body jumpsuits with snug-fitting hoods that provide scant protection from the invisibleradiation sleeting through their bodies.
他们穿着带有头罩的白色全体连身衣，以勉强保护他们不受无形核辐射的危害。
3
Central filamentsof the dusty clouds glow with a faint reddish photoluminesence as some dust grains effectively convert the star's invisible ultraviolet radiation to visible red light.