COLLOQUIUM:- Can We Send Relativistic-Speed Nanocrafts To Nearby Exoplanets? Challenges and Solutions
The Breakthrough Starshot initiative aims to launch gram-scale spacecraft to relativistic speeds of v~0.2 c, capable of reaching the closest Earth-like exoplanet, Proxima b, in 20 years. The realization of this mission would become a giant leap in the human history of space exploration and paves the way for interstellar travel. One of the most critical challenges facing this ambitious project originates from the interactions of relativistic nanocrafts with the interstellar medium during its journey to Proxima b. In this talk, the speaker will first introduce Breakthrough Starshot mission. He will then present their quantitative evaluation of the damage to a relativistic nanocraft by interstellar gas and dust. Third, the speaker will discuss the deflection and oscillation of a charged nanocraft due to the interstellar magnetic field. Fourth, he will discuss the gas drag force at high energy regime and quantify its effect on the deceleration of a relativistic lightsail. Finally, we will discuss practical strategies to mitigate the impacts of the interstellar medium, and to control the nanocraft attitude in order for the spacecraft to reach an intended exoplanet.
講者：Dr. Thiem HOANG(Center for Theoretical Astronomy and Space Science Institute, Korea)