What I took to be the Alt is equal to the Dec and the Azimuth makes no sense eg trying it a little while ago on Dubhe, the RA was 11h3.7m with what I thought was Az 247º 42' - no idea what that is. When I use "Show Position" on the handset, the RA/Dec coordinates look OK but there is another pair of coordinates shown which I assumed were the Alt/Az equivalents, but they don't agree with what Starry Night shows. Right clicking on an object and choosing "slew to" from the context menu seems to work OK. At this point I press "Connect" in Starry Night and the little red cross gets displayed sitting next to Polaris. I switch on the mount, go through the location, date and time questions and say "no" to alignment. I always park the scope (in the home position) via the handset and hence always start from there. Where I have a choice I've selected EqN for Track Mode and I enter the same latitude and longitude as stored in the handset. On the Telescope Set Up dialog in Starry Night, I've selected Celestron and tried NexStar 5i, 8i and 8 GPS. #Starry night pro enter coordinates serialConnection from computer to handset is via the supplied RJ-11 to serial cable connected to a USB port using Astronomiser's serial to USB converter. The SynScan handset firmware is version 3.20 (updated today, but had the same problems with 3.12). At present, I'm just using the mount and computer indoors till I can get it working. Nearly eighty years later, Isaac Newton would apply his Laws of Motion and Law of Gravitation to the motion of planetary bodies and fully develop the equations of Kepler's Laws to include the mass of the orbiting bodies.Does anyone use Starry Night to control an EQ6? If so, I could use some help. Johannes Kepler, using Tycho Brahe's observational data of Mars and its moons, was able to better distinguish the motion of orbiting bodies in his laws of planetary motion, but could not explain the reason. Using what we know about angular size and Kepler's Laws, how can we find the distance between Jupiter and its moons? However, he was unable to determine the distance of the moons from Jupiter. Monitoring the moons nightly, Galileo was able to observe and record the periods of the orbits of the four Galilean moons with a small degree of error. This finding did not conform to the widely-held view that all heavenly bodies orbited the Earth, as Aristotle and Ptolemy believed. This was the first observation showing that bodies could orbit other bodies which were themselves clearly in motion. In 1610, his discovery of four moons clearly orbiting Jupiter sent shockwaves through the scientific community of the time. In 1609, Galileo Galilei began using a telescope to study the sky. Jupiter holds a special place in astronomical history. Tutorials: Importing Images into MaxIm, FITS Header, Coordinates in MaxIm Terminology: Kepler's Third Law, small-angle formula, eccentricity, semi-major axis, orbital period Resources: Worksheet, Images of Jupiter's Moons, MaxIm, Starry Night Pro Rigel Observations: short exposure image of Jupiter showing moons
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