1. The problem statement, all variables and given/known data Are 11,2km/s enough, to wrest away from the Suns gravitational field? (We are departing away from the Earth planet, away from the sun) Here I am unsure if I should use Suns Radius or Earths Radius r. I think that Suns Radius would be more logical, since the problem is about getting away from the Gravitational Field of the Sun. Might be wrong though :) The Formula I need for this: v = √2γM/r Suns Mass: 1,989*1030kg Suns Radius: 696.342 km = 696342000m (Earths Radius : 6370km = 6370000m 2. Relevant equations v = √2γM/r 3. The attempt at a solution v = √2γM/r Inserting the Data : v = √2*6,672*10-11*m3*s-2*1,989*1030kg/696342000m My Result: 617375,1049m/s or ≈ 617,4km/s is needed to wrest away from Suns gravitational field. Solution: No, 11,2km/s is far not enough to wrest away from Suns gravitational field.