Earth Federation and Trisolaris together send the ship "Gravity" and two Droplets to pursue "Blue Space", as "Blue Space" has the ability to broadcast the location of Trisolaris.
Earth Federation and Trisolaris together send the ship "Gravity" to pursue "Blue Space". Two Droplets are also sent as assurance to Trisolaris because "Gravity" has the ability to broadcast the location of Trisolaris.