From the people who made Dr . Langeskov , The Tiger , and The Terribly Cursed Emerald A Whirlwind Heist , I do believe . <| sep |> Of course they aren ' t yours , you didn ' t pay for them . <| sep |> you think he will make it 4 , america wants to see an impeachment <| sep |> Then again , that was George bloody Harrison ! <| sep |> Mainly thanks to Spectroscopy . Planets in other solar systems are discovered when they pass between us and their sun . In doing so some light passes through the planet ' s atmosphere , interacts with it and finally reaches us . Every chemical compound present in the atmosphere leaves a distinct fingerprint in the light that we can observe . You can ' t do the same with mars because it never passes between the earth and the sun , there ' s almost no water in it ' s atmosphere , plus sending probes assure you much more precise measurements .