2907.sagews

x,y,z = var('x,y,z')
plot_vector_field3d((-x/(sqrt(x^2+y^2+z^2)^3),-y/(sqrt(x^2+y^2+z^2)^3),-z/(sqrt(x^2+y^2+z^2)^3)),(x,-10,10),(y,-10,10),(z,-10,10), colors='cyan')

x,y,z = var('x,y,z')
plot_vector_field3d((x/(sqrt(x^2+y^2+z^2)^3),y/(sqrt(x^2+y^2+z^2)^3),z/(sqrt(x^2+y^2+z^2)^3)),(x,-10,10),(y,-10,10),(z,-10,10), colors='cyan')