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@Article{Muresan:2012:SLM, author = "Marian Muresan", title = "Soft Landing on the {Moon} with {Mathematica}", journal = j-MATHEMATICA-J, volume = "14", number = "??", pages = "??--??", month = "????", year = "2012", CODEN = "????", ISSN = "1047-5974 (print), 1097-1610 (electronic)", bibdate = "Sat Mar 15 08:18:46 MDT 2014", bibsource = "http://www.math.utah.edu/pub/tex/bib/mathematicaj.bib", URL = "http://www.mathematica-journal.com/2012/08/soft-landing-on-the-moon-with-mathematica/", abstract = "We consider the problem of landing a spacecraft on the Moon, assuming that aerodynamic and gravitational forces of bodies other than the Moon are negligible, and lateral motion can be ignored. Accordingly, the descent trajectory is vertical, and the thrust vector is tangent to the trajectory. Because the spacecraft is near the Moon, we assume that the lunar acceleration of gravity has the constant value , that the relative velocity of the exhaust gases with respect to the spacecraft is constant, and that the mass rate is constrained by , where is constant and gives the maximum rate of change of the mass due to burning the fuel.", acknowledgement = ack-nhfb, journal-URL = "http://www.mathematica-journal.com/", }