Miniature nocturlabe - nocturnal - pendant

Miniature nocturnal - pendant This device is a miniature instrument built by H. Cole in 1570, the original of which is in the British Museum in London. It is used to determine the time at night with the help of the stars. The device is universal - it works at all latitudes of the northern hemisphere. Product information: Diameter: 5cm Weight: 60gr In an attractive gift box, with a molded case on which the device rests. Gift packaging: beautiful decorative box with castings. Material: made of zinc alloy and brass, lacquered using techniques from hundreds of years ago. A product of the Spanish company Hemisferium. User manual in English, French, Italian, and Spanish. A great gift for a sailor, navigator, fisherman, or anyone interested in astronomy. Nocturnal - Information: The nocturnal - star clock is a beautiful instrument for determining the time at night using the position of the stars. The device consists of a fixed disk divided into months, indicating every day of the year, a movable disk that determines hours on a scale of 1-12 and is equipped with a pointer - the smiling face of the moon, as well as the long arm of the movable pointer. In the center of the device is a viewfinder used to track the North Star (Polaris) - a fixed point around which other constellations, such as the Big Dipper, rotate. And precisely because the position of the North Star is fixed, we can relate the changing positions of other constellations to it over time. Our device - a replica of a 1570 instrument - was designed for the Kochab star in the Little Dipper constellation. But the most common and probably the simplest way is to set the pointer arm to the rear axis of the Big Dipper and the movable disk to the current date. This allows for reading the current sidereal time. Please note that sidereal time does not necessarily coincide with official time.