Celestron StarSeeker 80mm Gebrauchsanweisung - Seite 7
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G.
Aligning the Finderscope:
Do not be alarmed when you look through the telescope and the object is upside down and reversed left to
right. This is normal with an astronomical telescope. To align it:
1.
Choose a target in excess of one mile away. This will eliminate any possible parallax effect.
2.
Point the F80 EQ at your target and center it in the main optics of the telescope.
3.
Adjust the screws on the finder bracket until the cross hairs in the finder are centered on the target.
4. Tighten each screw a quarter of a turn so they will not come loose.
H. Preparation for astronomical observing requires that you:
1.
Orient the telescope so that the right ascension (polar) axis is pointing as close to true north as possible.
Use a magnetic compass if you are not sure which way north is.
2.
Make sure the mount is level. A carpenters level may be helpful.
3.
Recheck all hardware and knobs to make sure all are tight.
4. UNDERSTANDING THE SKY
A.
The Celestial - Coordinate System.
The celestial-coordinate system is an imaginary projection of the Earth's geographical coordinate system
onto the celestial sphere which seems to turn overhead at night. This celestial grid is complete with equator,
latitudes, longitudes and poles.
The Earth is in constant motion as it rotates on its axis. Actually the celestial-coordinate system is being
displaced very slowly with respect to the stars. This is called precession and is caused by gravitational
influences from the Sun, Moon and other celestial bodies.
The celestial equator is a full 360º circle bisecting the celestial sphere into the northern celestial hemisphere
and the southern celestial hemisphere Like the Earth's equator, it is the prime parallel of latitude and is
designated 0º.
Figure 3
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