Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!uunet!zephyr.ens.tek.com!tektronix!reed!reeder From: reeder@reed.UUCP (Doug Reeder) Newsgroups: comp.binaries.apple2 Subject: Documentation for Solar System/Planetary Probe simulation Message-ID: <13284@reed.UUCP> Date: 11 Sep 89 04:12:18 GMT Reply-To: reeder@reed.UUCP (Doug Reeder) Organization: Reed College, Portland OR Lines: 44 Numbers: When you must tell the computer which body (sun, planet, you) you want, 0 is always the sun, the planets are assigned numbers in the order you chose them, and you are the last number. If you took Earth and Jupiter, in that order, 1 is the Earth, 2 is Jupiter, and 3 is you. Commands: cale: the larger the scale, the smaller the area you see ime: number of days per calculation The more days per calculation, the faster things seem to move. Orbits get skewed when you calculate too many days at a time. urn fuel: A .1 burn will increase your velocity .1. Orbital burns are along your flight path,transverse is perpendicular. Positive transverse burns push you in when going clockwise and out going counterclockwise. uit this setup

ath trace: Toggle on or off nquire about location an velocity of a planet or yourself ocus: changes what body is shown motionless in the middle of the screen. elative velocity - you and another body lock eep a position so you can return to it o back to an earlier position cceleration(total): how much fuel you've used :list of commands Scale: 1 unit of distance = 10,000,000km 1 unit of time = 1 day 1 unit of mass = 1 solar mass 1 unit of velocity = 9.86E6 km/day = 114.1 km/sec (sorry!) The moon will not orbit the Earth unless the time increment is .05 or less.-- Doug Reeder USENET: ...!tektronix!reed!reeder Institute of Knowledge, Jinx BITNET: reeder@reed.BITNET "A blaster can point two ways." from ARPA: tektronix!reed!reeder@berkeley.EDU -Salvor Hardin Box 722 Reed College,Portland,OR 97202