@testset "Inner Loop" begin

  println("Testing Inner Loop")

  using Dates

  phase1 = Phase("Earth",
                 "Mars",
                 3600*24*365*1.5,
                 [1., 0.3, 0.],
                 [3., 3., 0.])

  phase2 = Phase("Mars",
                 "Jupiter",
                 3600*24*365*3.5,
                 [2., 3.7416573867739413, 0.],
                 [0.3, 1., 0.])
  inner_loop(DateTime(2024,3,5), [phase1, phase2])

  @test true

end