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The compass is extremely helpful in finding stars. If you know where you are and
where the star is,
all you have to do is determine the direction, such as due north, or
north by northwest, then check the compass to find it. |
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| Black Plastic |
Compass/Thermometer Key
Chain |
Quality Metal |
Black Plastic Compass
1.5" face, housed in a black,snap-lid plastic case with loop for chain attachment
No. EP420-BK. Only $2.95
Compass/Thermometer Key Chain
Two dial type indicators float in liquid filled chambers - direction and temperature.
No. EP420-KC. Only $4.95
Quality Metal Compass
Protective lid and needled stop lever to lock in the direction reading and protect the
needle from bouncing during jarring activities.
No. EP420-MT. Only $7.95 |
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The Astrolab |
| The Astrolab was developed in the early 16th century. It has been used for navigation
for over four centuries (the modern day sexton is an Astrolab with a mirror). It is
a wonderful tool finding angles by line of sight. Star charts tell you where
things are, both in direction and height (angle) above the horizon. See the angle on
the Astrolab, point it in the right direction and you should be able to zero in your
target. Once you know where it is, then point your telescope. |
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This fascinating 7" x 6" device is used to measure
angle of sight. Used extensively in making real scientific measurements of
declination, altitude and azimuth of celestial bodies, to observe the motion of the
earth, and to measure, slope, strike, dip, elevation of geological features.
No. EP420-AL. Only $12.95 |
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