system, gradually getting closer and closer to the orbit of mercury. 50. closer to the orbit of mercury. so, exlain closer to the orbit of mercury. so, exolain that? closer to the orbit of mercury. so, explain that? here closer to the orbit of mercury. so, explain that? here we closer to the orbit of mercury. so, explain that? here we are - closer to the orbit of mercury. so, explain that? here we are going i explain that? here we are going around in a explain that? here we are going around in a circle, explain that? here we are going around in a circle, we explain that? here we are going around in a circle, we launch i explain that? here we are going i around in a circle, we launch from the earth, we flew past the earth. the x is the spacecraft. they are flying past venus, we do two flybys of venus. we fly past venus twice, that s already happened. this is the flyby of the earth. 50 it that s already happened. this is the flyby of the earth. flyby of the earth. so it gets