"Questions to Heaven", a famous long poem by the Warring States period poet 屈原 qū​yuán, consisting entirely of questions exploring cosmic, historical, and mythological themes; it is a major work in the 楚辞 chǔ​cí collection.

Tianwen; an interplanetary exploration program by the China National Space Administration (CNSA), including missions to Mars (Tianwen-1) and beyond, named after the classical poem