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13

Look for different features on the Moon:

The most obvious features are craters. In fact

you can see craters within craters. Some craters have bright lines about them. These

are called rays and are the result of material thrown out of the crater when it was

struck by a colliding object. The dark areas on the Moon are called maria and are

composed of lava from the period when the Moon still had volcanic activity. You can

also see mountain ranges and fault lines on the Moon.

Use a neutral density filter (sometimes called a “moon filter”) when observing the

Moon. Neutral density filters are available from Meade as an optional accessory.

Spend several nights observing the Moon. Some nights, the Moon is so bright that it

makes other objects in the sky difficult to see. These are nights that are excellent for

lunar observation.

Observe the Solar System: 

After observing the Moon, you are ready to step up to the

next level of observation, the planets. There are four planets that you can easily

observe in your telescope:  Venus, Mars, Jupiter and Saturn.

Nine planets (maybe more...3 more planets have been discovered in the "Oort" cloud

at print time) travel in a fairly circular pattern around our Sun. Any system of planets

orbiting one or more stars is called a solar system. Our Sun, by the way, is a single,

dwarf star. It is average as far as stars go and is a middle aged star.

Beyond the planets are clouds of comets, icy planetoids and other debris left over

from the birth of our sun (the Oort cloud). Recently astronomers have found large

objects in this area and they may increase the number of planets in our solar system.

The four planets closest to the Sun are rocky and are called the inner planets.

Mercury, Venus, Earth and Mars comprise the inner planets. Venus and Mars can be

easily seen in your telescope.

Venus is seen before dawn or after sunset, because it is close to the Sun. You can

observe Venus going through crescent phases. But you cannot see any surface detail

on Venus because it has a very thick atmosphere of gas.

When Mars is close to the Earth, you can see some details on Mars, and sometimes

even Mars’ polar caps. But quite often, Mars is further away and just appears as a red

dot with some dark lines crisscrossing it.

Jupiter, Saturn, Uranus, Neptune and Pluto comprise the outer planets. These

planets, except for Pluto, are made mostly of gases and are sometimes called gas

giants. If they had grown much bigger, they may have become stars. Pluto is made

mostly of ice.

Jupiter is quite interesting to observe. You can see bands across the face of Jupiter.

The more time you spend observing these bands, the more details you will be able 

to see.

One of the most fascinating sights of Jupiter are its moons. The four largest moons

are called the Galilean moons, after the astronomer Galileo, who observed them for

the first time. If you’ve never watched the Galilean moons in your telescope before,

you’re missing a real treat! Each night, the moons appear in different positions around

the Jovian sky. This is sometimes called the Galilean dance. On any given night, you

might be able to see the shadow of a moon on the face of Jupiter, see one moon

eclipse another or even see a moon emerge from behind Jupiter’s giant disk. Drawing

the positions of the moons each night is an excellent exercise for novice astronomers.

Any small telescope can see the four Galilean moons of Jupiter, plus a few others, but

how many moons does Jupiter actually have?  No one knows for sure! Nor are we

sure how many Saturn has either. At last count, Jupiter had over 60 moons, and held

a small lead over Saturn. Most of these moons are very small and can only be seen

with very large telescopes.

The planet Jupiter. Jupiter's four

largest moons can be observed in a

different position every night.

Craters of the Moon are excellent

targets to observe.

Looking at or near the 

Sun

will cause 

irreversable

damage to your eye. Do not point

this telescope at or near the Sun. Do not look through the telescope as it is moving.

 

 

 

 

 

 

 

 

 

 

 

Содержание LightBridge

Страница 1: ...Instruction Manual 8 10 12 16 LightBridge Truss Tube Dobsonian Telescopes MEADE COM...

Страница 2: ...rreversible damage to your eye Eye damage is often painless so there is no warning to the observer that damage has occurred until it is too late Do not point the telescope at or near the Sun Do not lo...

Страница 3: ...RUCTIONS Always purchase the correct size and grade of battery 4 x AA type Alkaline batteries ANSI 15A 15AC IEC LR6 Always replace the whole set of batteries at one time taking care not to mix old and...

Страница 4: ...ottom truss lock knobs 3 7 Altitude bearing 8 Rear OTA Base Assembly 9 Side base panels 2 10 Front base panel 11 Circular base plates 2 12 Feet 3 Inset A 13 a Focus knob b Fine focus knob 16 models on...

Страница 5: ...se STEP 5 Next attach the three feet to the bottom panel Line up each foot and thread a small attachment screw into the foot to hold it in place Tighten to a firm feel STEP 4 Place the center bearing...

Страница 6: ...t panel Lift to remove the dust cover from the mirror Note You can thread the Altitude Adjustment Knob into the protrusion just below the Altitude Bearing 7 Use the Altitude Adjustment Knob when you a...

Страница 7: ...s to make it easier to line up more precisely with a target First assemble the red dot finder Slide the bracket over the groove of the red dot finder scope Tighten the two hex screws with the supplied...

Страница 8: ...D shows a correctly collimated LightBridge Dobsonian telescope as it appears when viewed through the focuser with the eyepiece removed To check and if necessary set the optical collimation follow thes...

Страница 9: ...flecting Telescope 1 Spider Vanes 2 Secondary Mirror 3 Parabolic Primary Mirror 4 Primary Mirror Hex Screws 5 Focuser Drawtube 6 Focused Image 1 2 3 4 5 6 Looking at or near the Sun will cause irrever...

Страница 10: ...veal oblong or elongated circles 2 Fig F Adjust the 3 collimating screws on the primary mirror housing until the circles are con centric on either side of the focus In summary the adjustment screws on...

Страница 11: ...too easily Just keep these bearing surfaces clean that s all the maintenance required 2 The altitude bearing surfaces 7 Fig 1 of the telescope are lightly lubricated at the factory for optimum perfor...

Страница 12: ...gher power eyepiece If the image starts to become fuzzy when you use higher magnification back down to a lower power The atmosphere is not sufficiently steady to support high powers Keep in mind that...

Страница 13: ...enus going through crescent phases But you cannot see any surface detail on Venus because it has a very thick atmosphere of gas When Mars is close to the Earth you can see some details on Mars and som...

Страница 14: ...e like a large football and are called elliptical galaxies There are many galaxies that are irregularly shaped and are thought to have been pulled apart because they passed too close to or even throug...

Страница 15: ...r blurred or distorted due to temperature differences between inside and outside air Also it is a good idea to allow your telescope to reach the ambient surrounding outside temperature before starting...

Страница 16: ...nded period perhaps for one month or more it is advisable to remove the batteries from the battery pack Batteries left in the telescope for prolonged periods may leak causing damage g Do not leave you...

Страница 17: ...luminum altitude bearings Secondary Mirror Support 4 vane steel Mirror 10 Focal length 1270mm 50 Focal ratio f 5 Resolving Power 0 56 arc seconds Limiting visual magnitude 14 Focuser h t u m i z a r o...

Страница 18: ...ware and captive bolts Machined aluminum altitude bearings Secondary Mirror Support 4 vane steel 2 1 r o r r i M Focal length 1524mm 60 Focal ratio f 5 Resolving Power 0 45 arc seconds Limiting visual...

Страница 19: ...olts Machined aluminum altitude bearings Secondary Mirror Support 4 vane steel m m 6 0 4 6 1 r o r r i M Focal length 1829mm 72 Focal ratio f 4 5 Resolving Power 0 45 arc seconds Limiting visual magni...

Страница 20: ...hoto Visual Color Filters Color filters significantly enhance visu al and photographic image contrast of the Moon and planets Each filter threads into the barrel of any Meade 1 25 eyepiece and into th...

Страница 21: ...otrusion at the bottom of the tension plate The protrusion fits into the indent at the bottom of the brake Thread the tension adjustment bolt into the tension plate on the side panel of the base assem...

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Страница 24: ...or part a Return Goods Authorization RGA number must be obtained from Meade by writing or calling 800 626 3233 Each returned part or product must include a written statement detailing the nature of t...

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