彗星会不会是地球上生命的起源？
Could human civilization spread across the whole galaxy - Roey Tzezana
Could we actually live on Mars - Mari Foroutan
Free falling in outer space - Matt J. Carlson
How do we study the stars - Yuan-Sen Ting
How small are we in the scale of the universe - Alex Hofeldt
How to detect a supernova - Samantha Kuula