Observation of Hawking radiation by 2040?

Will a Pulsar Timing Array experiment detect gravitational waves from a resolvable point source before the year 2030?

Will neutrinoless double beta decay be observed before 2100?

Will Betelgeuse go supernova before 2100?

Will the "Destruction of a Nuclear Bomb Using Ultra-High Energy Neutrino Beam" occur before 2034?

Will we observe a supernova in the Milky Way Galaxy before 2050?

Will a gravitational wave signal be observed from a Thorne-Żytkow object by 2040?

Will a graviton be directly observed in a peer-reviewed paper before 2100?

Will a new interstellar object be observed inside the solar system in 2025 ?

Will any astronomical object with redshift >= 20 be observed before 2030?