The sun radiates energy at rate 3.77 x 1026 j per second the loss of mass it suffers per second is? Share with your friends Share 1 Neha Gupta answered this E = ∆mc2where ∆m is the mass defect∆m = Ec2∆m = 3.77×10263×108∆m = 4.18×109 kg 2 View Full Answer