G = 6.674e-11

Rsun_m  = 6.957e8
Msun_kg = 1.99e30


Mjup_kg = 1.89813e27; kg_Mjup = 1. / Mjup_kg
Mjup_Mearth = 317.828; Mearth_Mjup = 1. / Mjup_Mearth
Mjup_Msun = Mjup_kg / Msun_kg; Msun_Mjup = Msun_kg / Mjup_kg
Rjup_Rsun = 0.1028 ; Rsun_Rjup = 1. / Rjup_Rsun

Rearth_Rjup  = 0.08921 ; Rjup_Rearth = 1. / Rearth_Rjup
Rearth_Rsun = Rearth_Rjup * Rjup_Rsun ; Rsun_Rearth = 1. / Rearth_Rsun


au_m = 1.496e11 ; m_au = 1. / au_m

day_sec = 24*60*60. ; sec_day = 1. / day_sec
year_sec = day_sec*365; sec_year = 1. / year_sec
