User manual MEADE DS-2000-LNT

[. . . ] Instruction Manual DS-2000 Series Reflecting and Refracting Telescopes AutoStar® -- LNTTM -- SmartFinderTM TM MEADE. COM 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® Telescope to look at the Sun! [. . . ] Locate and center the Landmark in the eyepiece, then press ENTER. { Identify is an exciting feature for an observer who wants to scan the night sky and start exploring. After the telescope has been properly aligned, use the Autostar Arrow keys to move about in the sky. Then follow this procedure: IMPORTANT NOTE: Only use the Arrow keys to move the telescope during the Identify procedure. Do not loosen the telescope locks or move the base or alignment is lost. When a desired object is visible in the eyepiece, keep pressing MODE until the "Select Item: Object" menu is displayed. Scroll through the Object menu options until the "Object: Identify" screen appears. Autostar searches the database for the identity of the object being observed. If the telescope is not directly on an Autostar database object, the nearest database object is located and displayed on the screen. Press GO TO and the telescope slews to that object. 23 Event Menu The Event menu provides access to dates and times of astronomical events. The Event database includes: Sunrise and Sunset calculates the time that the Sun rises or sets on the current date. Find rise and set times for other dates by entering a new date into the "Setup: Date" menu. Moonrise and Moonset calculates the time that the Moon rises or sets on the current date. Find rise and set times for other dates by entering a new date into the "Setup: Date" menu. Moon Phases displays the date and time of the next Full, New, 1st Quarter, and 3rd Quarter Moon. Meteor Showers provides information on upcoming meteor showers, such as the Perseids, the Leonids, etc. NOTE: Meteor showers cover large areas of the sky and are usually best observed with the naked eye. Solar Eclipse lists upcoming Solar Eclipses, including the date and type (total, annular, or partial) of eclipse, and the location and time of the first and last contacts of the Moon's shadow. Lunar Eclipse lists upcoming Lunar Eclipses, including the date and type (total, partial, penumbral) of eclipse. (Minimum) of Algol is the minimum brightness of the dramatic eclipsing binary star system, Algol. Every 2. 8 days during a 10-hour period, Algol undergoes a major change in apparent magnitude as one of the two stars passes behind the other. The combined magnitude of the two stars thus dips from +2. 1 to a minimum of +3. 4 halfway through the eclipse as the second star is hidden. Autumn and Vernal Equinox calculates the time and date of the fall or spring equinox of the current year. [. . . ] Titan, the largest of Saturn's 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. 39: Saturn has the most extensive ring structure in our Solar System. Fig. 40: 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. [. . . ]