You have to know which question to ask; in this case, finding the size of the object and the approximate density of different kinds of star from a google search, then combining that with a basic knowledge of Newtonian gravity gets us to an first order approximation of the answer.
You have to know which question to ask; in this case, finding the size of the object and the approximate density of different kinds of star from a google search, then combining that with a basic knowledge of Newtonian gravity gets us to an first order approximation of the answer.