User manual MEADE LX-90

[. . . ] Instruction Manual 8" LX90 Schmidt-Cassegrain Telescope with Autostar Hand Controller Meade Instruments Corporation The Meade Schmidt-Cassegrain Optical System (2) (1) Ray (2) Ray (1) (2) (1) Focal Plane Secondary Mirror Primary Baffle Tube Field Stops Primary Mirror Correcting Plate Secondary Baffle (1) (2) In the Schmidt-Cassegrain design of the Meade LX90, light enters from the right, passes through a thin lens with 2-sided aspheric correction ("correcting plate"), proceeds to a spherical primary mirror, and then to a convex secondary mirror. The convex secondary mirror multiplies the effective focal length of the primary mirror and results in a focus at the focal plane, with light passing through a central perforation in the primary mirror. The Meade 8" LX90 Schmidt-Cassegrain includes an oversize primary mirror of an 8. 25" diameter, yielding a fully illuminated field-of-view significantly wider than is possible with a standard-size primary mirror. Note that light ray (2) in the figure would be lost entirely, except for the oversize primary. [. . . ] If "Terrestrial" is selected, the tracking motor is turned off. To learn how to track an object automatically, see page 18. Site provides access to several options including: " Select: Displays the currently selected observing site. Use the Scroll keys to cycle through all available sites (see "Add" below). Press ENTER when the site you wish to select displays. Use this option when you move to a different geographic location. " Add: Allows you to add new observing sites to the database (up to six sites may be stored). Scroll through the list of Countries/States. Press ENTER when the site you wish to add displays. Then choose the desired city in the same manner. Delete: Deletes a stored site from the database. world posted new photos daily. You can find websites for almost any topic relating to astronomy on the internet. Try the following key word searches: NASA, Hubble, HST, astronomy, Messier, satellite, nebula, black hole, variable stars, etc. Check out Meade's website for the latest product and technical information. You can download the latest software revisions, links to other astronomical sites, coordinates of celestial objects and the latest satellite tracking information for your Autostar handset. You'll find our website at: http://www. meade. com/ Here are some other sites you might find interesting: · Sky & Telescope: http://www. skypub. com/ · Astronomy: http://www2. astronomy. com/astro/ · The Starfield: http://users. nac. net/gburke/ · Astronomy Picture of the Day: http://antwrp. gsfc. nasa. goc/apod/ · Heaven's Above (satellite observing information): http://www. heavens-above. com/ " 27 Time Zone Atlantic Eastern Central Mountain Pacific Hawaii Shift -4 Hours -5 Hours -6 Hours -7 Hours -8 Hours -10 Hours " Edit: Edits a selected site, including: the name, latitude, longitude, and time zone. Time Zone refers to the Greenwich Mean Time (GMT) time zone shift. Users West of Greenwich, England use "-" hours, East of Greenwich use "+" hours. For the United States, look up the time zone shift in table above. NOTE: Autostar compensates for daylight savings time, if selected. See "Setup Menu: Daylight Saving, " page 26. Table 1: Time Zone Shift. Owner Info accesses the owner information menu, including: " Name: Users may enter both their first and last names using the Up and Down Arrow keys to cycle through the alphabet. Use the Right and Left Arrow keys to move through the text. [. . . ] The Orion Nebula is located South of the belt and is one of the most observed deep-sky objects by amateur astronomers. Extending from the "pointer stars" of the Big Dipper's cup is Polaris, the North Star. Extending from Polaris is the Great Square shared by the constellations Pegasus and Andromeda. . Rigel Orion Betelgeuse Andromeda Gemini Pollux Castor Pegasus "Summer Triangle" Deneb Polaris "Sickle" Regulus Cygnus Leo "Big Dipper" Vega Altair Lyra Boötes Arcturus Aquila Spica Antares Virgo Scorpius Fig. [. . . ]