What is Equatorial Mount Meaning of Equator What is Equator

The equatorial mount was made to improve on the shortcomings of the horizon device. Its main purpose is to overcome the effect of the Earth's rotation on stargazing. As you know, it is precisely because of the rotation of the earth that the stars rise in the east and set in the west.

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The equatorial mount was made to improve on the shortcomings of the horizon device. Its main purpose is to overcome the effect of the Earth's rotation on stargazing. As you know, it is precisely because of the earth's self-shaped Zen locust rotation that the rolling stars have the phenomenon of rising in the east and setting in the west.

The Earth is constantly rotating from west to east, 360 degrees in 24 hours, and we only need to design a device that makes the telescope rotate the same speed as the Earth, but in the opposite direction (from east to west), to eliminate the effect of the Earth's rotation. Theoretically, the coordinate system used by the equatorial mount is the equatorial coordinate system. It is equivalent to a large grid that rotates and moves with the stars.

Since it rotates with the stars, the two values that describe the position of each star – right ascension and declination – are constant. In layman's terms, an equatorial mount is a device that tries to make a telescope rotate with this grid. When using an equatorial mount, it should first align its polar axis with the North Celestial Pole.

After being fully aligned, the telescope is directed at any star, and the declination does not need to be adjusted, but only needs to rotate the telescope at a constant speed in the direction of right ascension (or time angle) according to the speed of the star, so that the star can remain in the telescope market. That's 360 degrees a day (because the Earth rotates once a day). This is known as auto-tracking.

Of course, if you're using a manual equatorial mount, you'll need to adjust the right ascension (or hour angle) knob at regular intervals, and the declination doesn't need to be adjusted (ideally, of course, if the polar axis is not aligned enough, you need to fine-tune the declination properly). There is no need to adjust two axes at the same time, which is easy to track, which is the fundamental reason for using an equatorial mount Many popular astronomy books will teach you to find stars by calculating the time angle, and it is not convenient to use the time angle when really doing amateur observations, because you have to calculate the sidereal time first, and you also need to know the right ascension and denquation value of the celestial body you want to observe. Coupled with the accuracy of the time angle disk, it is far less convenient to find stars directly than to use the star map.

Therefore, it is advantageous only for the kind of fixed telescopes that have a fixed base, the polar axis is already aligned, and for people who are very unfamiliar with constellations. In addition, it is indeed a bit difficult to find stars directly with an astronomical telescope, because the field of view of the primary mirror is often small. Therefore, astronomical telescopes usually have a finderscope, which has a relatively large field of view and is used to assist in finding stars.

Of course, it would be much easier if there was a pair of binoculars to help. That's why many experienced enthusiasts advise beginners to buy binoculars first.

1. The equator, a geographical term, is the longest circumference line in the trajectory of the point on the earth's surface with the rotation of the earth. Its radius is and its circumference is kilometers. The equator is the dividing line between the northern and southern hemispheres, which divides the earth into two hemispheres, north of which is the northern hemisphere and south of which is the southern hemisphere, which is the baseline that divides latitude.

The equator has a latitude of 0°, which is the longest latitude on Earth. At the same time, the equator is the place where the acceleration of gravity on Earth is minimal.

2. The equator is the dividing line between the northern and southern hemispheres, and it is also the zero degree latitude on the earth. The equatorial region is tropical twice a year, with hot weather and high temperatures. The center of the equator coincides with the center of the earth, and it is also the longest coil of latitude on the earth, with a total length of more than 40,000 kilometers.

3. The equator passes through Gabon, Congo, Zaire, Uganda, Kenya, Somalia, Maldives, Indonesia, Ecuador, Colombia and Brazil. In these countries, people use different signs to indicate the equatorial line. In the Congo, for example, the equatorial line is represented by a number of small pillars arranged in a straight line, called equatorial piles.