User manual MEADE DS-2000

[. . . ] Instruction Manual DS-2000 Series Reflecting and Refracting Telescopes Refracting Telescopes use a large objective lens as their primary light-collecting element. Meade refractors, in all models and apertures, include achromatic (2-element) objective lenses in order to reduce or virtually eliminate the false color (chromatic aberration) that results in the telescopic image when light passes through a lens. Reflecting Telescopes use a concave primary mirror to collect light and form an image. In the Newtonian type of reflector, light is reflected by a small, flat secondary mirror to the side of the main tube for observation of the image. Eyepiece F 2-Element Objective Lens Refracting Telescope In the refracting telescope, light is collected by a 2-element objective lens and brought to a focus at F. Secondary Mirror Concave Mirror F Reflecting Telescope Eyepiece In contrast, the reflecting telescope uses a concave mirror for this purpose. CONTENTS WARNING! Never use a Meade® DSTM Telescope to look at the Sun! [. . . ] Autostar's menus are organized for quick and easy navigation: I I I I I Press ENTER to go deeper into Autostar's menu levels. Press the Scroll keys to move up and down through the options or lists Press the Arrow keys to move the cursor across the display. Press and hold the Scroll Up key to increase the scrolling speed when a message is scrolling across the display. Press and hold the Scroll Down key to decrease the scrolling speed when a message is scrolling across the display. Adjusting the Speed of a Scrolling Message I I 22 MENUS AND MENU OPTIONS Object Menu Almost all observing with Autostar is performed using the Object menu category. (NOTE: Exceptions include Guided Tour and Landmark Survey. ) See GO TO SATURN, page 20, for an example of observing using the Object menu. An Autostar database is a list of viewable objects, such as stars, planets, comets, nebulae, and so forth. When one of these objects is selected from a database, Autostar moves your telescope (if properly aligned) and points it at the selected object. The Object Menu options include: Solar System is a database of the eight planets (Earth is not included) in order out from the Sun, followed by the Moon, asteroids, and comets. Constellation is a database of all 88 Northern and Southern Hemisphere constellations. When this menu option is chosen and a constellation name appears on the first line of the screen, press GO TO once to change the second line to the name of the brightest star in the constellation. Use the Scroll keys to cycle through the list of stars in the constellation, from brightest to dimmest. Deep Sky is a database of objects outside our Solar System such as nebulae, star clusters, galaxies, and quasars. Star is a database of stars listed in different categories such as named, double, variable, or nearby. Satellite is a database of Earth-orbiting objects such as the International Space Station, the Hubble Space Telescope, Global Positioning System (GPS) satellites, and geosynchronous orbit satellites. User Objects allows the user to define and store in memory deep-sky objects of specific interest that are not currently in the Autostar database. See "Appendix B" for more information. Select Item: Object Solar System Mercury Etc. Satellite Select Add Delete Edit User Objects Select Add Delete Edit Landmarks Select Add Delete Identify Select Item: Event Sunrise Sunset Moonrise Moonset Moon Phases Next Full Moon Next New Moon Next 1st Qtr Next 3rd Qtr Meteor Showers Quadrantids Lyrids Eta Aquarids Delta Aquarids Perseids Orionids Taurids Leonids Geminids Ursids Solar Eclipses Lunar Eclipses Min. of Algol Autumn Equinox Vernal Equinox Winter Solstice Summer Solstice Select Item: Guided Tour Tour Objects Tonight's Best How Far is Far A Star's Life Select Item: Glossary A. . . Z. . . Select Item: Utilities Timer Set Start & Stop Alarm Set On & Off Eyepiece Calc. Field of View Magnification Suggest Display Options Sun Warning Getting Started Brightness Adj. Battery Alarm Landmark Survey Sleep Scope Park Scope Select Item: Setup Align Easy One Star Two Star Date Time Daylight Saving Telescope Tele. Model Focal Length Az/Alt Ratio Mount Train Drive Tracking Rate Reverse L/R Reverse Up/Dn Calibrate Motor High Precision Targets Astronomical Terrestrial Site Select Add Delete Edit Owner Info Download Statistics Reset Fig. [. . . ] Titan, the largest of Saturn's 18 moons can also be seen as a bright, star-like object near the planet. Deep-Sky Objects Star charts can be used to locate constellations, individual stars and deep-sky objects. 36: Saturn has the most extensive ring structure in our Solar System. Fig. 37: The Pleiades is one of the most beautiful open clusters. Stars are large gaseous objects that are self-illuminated by nuclear fusion in their core. [. . . ]