I will discuss possibility of negative radiation pressure e.g. from astronomical objects and how we could observe it, also its different potential applications like medical and computational e.g. 2WQC (two-way quantum computers). Photon sources create positive radiation pressure p=/c being toward surface, pushing it. However, generally it could be also outside surface: pulling it, for example using a process which in T-symmetry perspective (H -> -H) creates positive radiation pressure - like synchrotron radiation generated by charge travelling on a circle, which also does it in T-symmetry perspective. Similar T/CPT symmetry argument suggests that black holes might generate negative radiation pressure. I also will suggest related solution to ANITA anomaly.

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