c program to take exo system parameters and spit out the lab data
          print*,'Enter the transit depth:'
          read*,f
          print*,'Enter stellar radius:'
          read*,rstar
          print*,'Enter mass of star:'
          read*,wstar
          print*,'Enter stellar temperature:'
          read*,tstar
          rplanet=rstar*(f**0.5)
          print*,'Enter exoplanet mass:'
          read*,xomass
          density=3.0*xomass/(4.0*3.14*rplanet**3)
          print*,'Enter orbital period:'
          read*,xoperiod
          semi=(wstar*1.69e-12*xoperiod**2)**0.3333
          tplanet=tstar*0.70*(rstar/semi)**0.5
          print*,'Exoplanet radius : ',rplanet
          print*,'Semi-major axis  : ',semi
          print*,'Exoplanet mass   : ',xomass
          print*,'Exoplanet density: ',density
          print*,'Exoplanet temp   : ',tplanet
         stop
          end