Welcome to photosphers.us. Here you will find basic information about the various atmospheres and photospheres encountered in astronomy. Also, synthetic spectral energy distributions (SEDs) can be found here for objects all across the Hertzsprung-Russell (HR) diagram, including giant planets.

Click on an area of the HR diagram to download synthetic SEDs for specific types of stellar, substellar, and planetary objects.

Planets Sun Mercury MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS MS WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD WD GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI GI BD