Consider a model of the star Dschubba (8 Sco), the center star in the head of the constellation Scorpius. Assume that 8 Sco is a spherical blackbody with a surface temperature of 28,000K and a luminosity of 30550Lo, where Lo is the luminosity (total power radiated) of the Sun [Data: Lo = 3.83 x 106W] 1. [5%] Determine the radius of 8 Sco in [km]. 2. [5%] What is Amax for the blackbody emission of 8 Sco? 8 Sco is 400 ly away from Earth [Data: 1 ly = 9.461 x 10 km]. 3. [5%] How much power per unit of area from 8 Sco reaches Earth? 4. [10% ] Assuming all photons from & Sco are emitted with Amax wavelength, how many photons per unit area per second from 8 Sco reach Earth?