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Observation

Youshouldallowabout90minutesforthetemperatureadjustmentbefore observing.

If the telescope is set up e.g. from a heated car or house on the free field, it can come

toasocalled"Tubus-Seeing".Thisresultsfromthemainmirrornotyetadaptedtothe

temperature difference.

Only after the temperature adjustment the telescope shows a sharp picture.

The first observations are best practiced during the day, so you will quickly become

familiar with the operation of your new telescope.

First select a simple object: a mountain top, a lighthouse or the like.

Roughly align the telescope to it.

Now target the target object with the light spot finder.

Nowtheobjectshouldalreadybevisibleinthe26mmeyepiece.

Now the image can be carefully focused with the eyepiece extension.

Nowyoucandaretogotothemoonintheevening(ifvisible);theoperationshouldbe

easy even in the dark. The phases that are increasing and decreasing are best suited for

observing the moon, with their detailed shadow casts that allow crater formations and

the like to emerge very vividly. During the full moon the surface appears relatively low-

contrast and without structure.

For moon observation a neutral gray filter is recommended, which attenuates the partly

bright light. This is available as an accessory from your specialist dealer.

Spend a few nights observing the moon; it is very interesting to see how individual

formations such as mountains, craters and Mary change with changing phases of the

moon!

Planets

On their way around the sun, the planets constantly change their position in the sky.

Consult a monthly astro magazine (Interstellarum, Astronomy Today, Stars and Space)

to find planets in the sky or search the Internet. In the following you will find a list of the

planets which are particularly suitable for observation with the Messier telescope:

Venus

ThediameterofVenusisabout9/10ofthediameteroftheearth.WhileVenusorbits

around the Sun, the observer can follow how it constantly changes its light phases: Sickle,

halfVenus,fullVenus-verysimilartowhatyouareusedtofromthemoon.Theplanet

diskofVenusappearswhite,becausethesunlightisreflectedbyacompactcloudcover

that covers all surface details.

Mars

The diameter of Mars is about half the diameter of the earth. Mars appears in a telescope

as a tiny, reddish-orange slice. There's a chance you might spot a touch of white when you

look at one of the planet's two icy polar caps. Approximately every two years, additional

details and color effects become visible on the planet's surface. This happens whenever

Mars and Earth come closest to each other on their orbits.

Jupiter

ThelargestplanetinoursolarsystemiscalledJupiter,itsdiameteriseleventimeslarger

than the Earth. The planet appears as a disk over which dark lines extend. These lines are

cloudbandsintheatmosphere.Evenatthelowestmagnification,fourofthe18Jupiter

moons(Io,Europa,GanymedandCallisto)canberecognizedas"star-shaped"lightpoints.

BecausethesemoonsorbitJupiter,thenumberofvisiblemoonsmaychangeovertime.

Saturn

Saturn has nine times the earth diameter and appears as a small, round disc. His rings

protrudefrombothsidesofthisdisc.Galilei,whoin1610wasthefirstmantoobserve

Saturn in a telescope, could not have foreseen that what he saw would be rings. He

thought Saturn had "ears." Saturn's rings consist of billions of ice particles, their size

probably ranging from the tiniest dust particle to the size of a dwelling house. The largest

The moon craters are good observation objects,

especially for beginners.

TheplanetVenusduringthesickle-shapedphase.

Thefourinner("Galilean")modesoftheplanetJupiter

can be observed each night in a different position

Appendix

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