The star nearest to our Sun is called Proxima Centauri. It has a surface temperature of approximately 3000 Kelvin and a luminosity about 1/1000th of the Sun’s. Which type of star is Proxima Centauri, and what color is it?gen nuclei are fused together to form a helium nucleus, the mass of the product is 0.7% less than the mass of the reactants. If 1 gram (1 × 10-3 kg) of protons were completely fused into helium nuclei, the mass of the helium nuclei produced would be 6.8 × 10-6 kg less than the mass of the protons. Using the equation E = mc2, calculate how many joules of energy would be produced by converting 6.8 × 10-6 kg of matter into energy in this fusion reaction. Use c = 3 × 108 m/s.