Physical and astronomical constants

G = 6.66 ´ 10⁻⁸ ergs∙cm∙gr⁻²

R = 8.26 ´ 10⁷ ergs∙mol∙gr^?1∙K⁻¹

a = 7.64 ´ 10⁻¹⁵ ergs∙cm^?3∙K^?4

c = 3 ´ 10¹⁰ cm∙sec⁻¹