She stares at him a bit and then smiles brightly . Yes . it is a nice party . I should not be drinking so much , but I have not for some time . Do I know you ? I cannot recall name . She holds her hand out . Alixandra Mirovna . <| sep |> Fuckin rad <| sep |> Why ? If you can ' t tell the difference between yesterday and 6 months ago i doubt anything else you have to say is worth reading . <| sep |> I gotta look at some orbital mechanics booksIf you really want to go through with that I highly recommend Introduction to rocket science and e n g i n e e r i n g R o c k e t S c i e n c e E n gineeringTravisdptelrefsr 11 ? sbooksieUTF 8 qidtelsr 11 k e y w o r d s i n t r o d u c t i o n r o cketscienceandengineering . It goes reasonably into depth but is still accessible with a decent highschool math and physics background . Besides orbital mechanics it covers the basics of pretty much all aspects of rocket science history , thermodynamics , orbital mechanics , propulsion elements etc . It is a bit pricey though , you probably want to find it somewhere cheaper . If you ' re a bit more advanced primarily in math you could also checkout Fundementals of a s t r o d y n a m i c s A s t r o d y n a m i c s D o v e r A e r o n a u t i c a lEngineeringdptelrefpdsim 141 ? encodingUTF 8 psc 1 refRID 28 SJEFQNHPYFH 7 TRQ 6 D 0 which is nice and cheap or Orbital Mechanics for engineering s t u d e n t s M e c h a n i c s E n g i n e e r i n g S t u d e ntsAerospacedptelrefpdsim 143 ? encodingUTF 8 psc 1 refRIDFZJ 4 STCA 35 DEREM 7 VMZ 5 if you really want to make it your job . I am a mechanical engineer by trade but I am really interested in spaceflight and orbital mechanics so in the past months I have been catching up with those books .