Astrology sphere ring

Astrology sphere ring DEFAULT
  • Astronomers in the 16th through 19th centuries used to wear rings that unfolded to become instruments used for calculations.
  • The rings, which looked like normal finger rings, were actually armillary spheres, which astronomers used in their work.
  • Some of the rings, now relics, are showcased by the British Museum. 

Astronomers aren’t normally associated with jewelry, but scientists studying the heavens from the 16th century through to the 19th century apparently had more than a passing interest in some very unique accouterments. As My Modern Met explains, ancient astronomers had a habit of wearing an instrument as an accessory in their everyday wardrobe.

To anyone glancing at one, it would look like a normal finger ring, but when removed and unfolded it became a tool for helping to better grasp Earth’s place in space. More specifically, the rings turned into what are known as armillary spheres, which can be used for a variety of purposes, including calculations.

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But not everyone that wore the rings work them specifically for their usefulness as an instrument for astronomy. Some wore these types of rings to show off their level of education, as only someone who was well-educated would wear such a fancy tool on their finger. They were also sometimes worn for religious reasons, according to jewelers that spoke with My Modern Met.

The site explains:

The British Museum has a collection of several armillary sphere rings that are incredibly well-crafted and detailed. When closed, they look like any other ring, but as the different bands are fanned out, the rings take on a unique quality. Built with anywhere between two to eight moving bands, these intricate pieces of jewelry would need to have been executed by skilled craftsmen.

I think what’s most interesting (to me anyway) about these rings is the fact that they were, for some, important tools to grasp advanced concepts of astronomy, but for others, they were almost a way to brag about their own accomplishments. I mean, being an astronomer several centuries ago surely took plenty of work and a whole lot of learning (as is still true today), but scientists aren’t typically known for being braggadocious.

Imagine if modern doctors walked around in public with a stethoscope around their necks, just to show people that they work in the medical field and are therefore very important. That’s kind of what was going on with these rings, only in a somewhat more subtle manner.

You wouldn’t know what the ring was until it was taken off and unfolded, so I suppose it wasn’t an overly obnoxious accessory, but I can just imagine some prideful astronomer walking around in the 16th century, unfolding his ring every time he sat down to have a bite to eat. I bet it happened.

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Mike Wehner has reported on technology and video games for the past decade, covering breaking news and trends in VR, wearables, smartphones, and future tech.

Most recently, Mike served as Tech Editor at The Daily Dot, and has been featured in USA Today,, and countless other web and print outlets. His love of reporting is second only to his gaming addiction.

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Astronomical Sphere Ball Ring S925 Sterling Silver

Size Guide

This is a chart that will be extremely helpful for you to determine the ring size that you need. You can either make use of a tape measure or a small piece of string to measure the area that will be occupied by the ring. When it becomes a complete circle, make a mark on such string. This will be helpful for you to compare with the chart that is mentioned below.

Inside DiameterInside CircumferenceSIZE
(in)(mm)(in)(mm)United StatesUnited KingdomItalyFranceGermany
New ZealandSwitzerland
South Africa


1. Measure your finger in warm temperatures at the end of the day.

2. If your knuckle is a lot larger than the base of your finger,measure both the base of your finger and your knuckle and select a size between the two.

3. When considering a wide band, move up a size from your measurement, for comfort’s sake.

4. The most popular ring size are 7(U.S) & 8(U.S).

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2pcs Pack Astronomical Ring Astrology Mens Zodiac Rings Sphere Ring that Folds out to an Astronomical Sphere 16th Century Astronomical Ring

2pcs Pack Astronomical Ring Astrology Mens Zodiac Rings Sphere Ring that Folds out to an Astronomical Sphere 16th Century Astronomical Ring


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Item #: 25636023


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Product Details

  • PACKAGE INCLUDES: 2 Pcs pack with (1 x Gold 1 x Silver) astronomical ring Inner diameter: 17.3mm, Ring Size 7
  • RING OR NECKLACE: Perfect for use as an astronomical sphere ring or attaching to a nice necklace string, this astronomical ring will be a perfect sphere ring for your woman or mans zodiac ring collection
  • UNFOLDING: The combination is a delicate ring, unfolding into an astronomical sphere ball. The entire universe at your fingertips, as the different bands fan out, the rings take on a unique quality as a ring that folds out to an astronomical sphere
  • QUALITY MATERIAL: The astronomical sphere ring is made of stainless steel alloy, silver-plated outer layer. High polished craft with no sharp edges for a comfortable fit. Ideal gift for your lover, wife, girlfriend, mother, daughter and perfect as a cute zodiac ring
  • UNIQUE ENGRAVINGS: The beautiful patterns on this ring are carved by skilled craftsmen. Different patterns and letters on the ring make you look stylish. Inscriptions placed on this zodiac ring are often used as decorative elements on the bands and astrology ring sets
Package Dimensions ‏ : ‎2.28 x 1.54 x 0.28 inches (5.8 x 3.9 x 0.7 cm); 1.45 Ounces (41.11 grams)
Department ‏ : ‎Womens
ASIN ‏ : ‎B084BR5GRH
What is in the box2pcs Pack Astronomical Ring... For more details, please check description/product details


2pcs Pack Astronomical Ring Astrology Mens Zodiac Rings Sphere Ring that Folds out to an Astronomical Sphere 16th Century Astronomical Ring

Customer Questions & Answers

  • Question: Does it come with chains?

    Answer: This item does not come with chains, the package includes the 2 different rings.
  • Question: What size does it come in?

    Answer: The rings come in size 7
  • Question: Los nesecito en size 9

    Answer: Currently we only have the one siz

Customer Ratings

17 customers ratings

  • 5 Star 36%
  • 4 Star 14%
  • 3 Star 15%
  • 2 Star 14%
  • 1 Star 21%

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Customer Reviews

Ke•• ••nd

September 11, 2021


One of the rings broke the day I got it

Av•• ••er

August 18, 2021

Get what you pay for

Really cheaply made with very soft metal. Pins are sharp and make wear uncomfortable, not for every day use, but it looks good at least.

Am•• ••er

August 15, 2021

Too small

It was too small

Bl•• ••od

August 5, 2021

they broke after like 2 weeks

meh,, they look cool atleast

Ki•• ••er

July 14, 2021

Pretty cool

I love how it folds up! Pretty cool.

Sy•• ••ll

April 13, 2021


Very cheaply made. The metal was sharp on the sides and cuts your finger as you put the ring on.

Ka•• ••ay

April 6, 2021

One ring...

Only recieved one ring (gold), not two.

He•• ••c.

February 22, 2021

Pretty but cheap

While it folds as advertised the ring very quickly fell into three separate layers, I gave this as a gift to my bf so we could have complimentary jewelry but because it broke so quickly we did not wear them

De•• ••ns

January 8, 2021


One of the rings broke on me but I still like it

Am•• ••er

January 7, 2021

Design flawed

Broken when received. The small pin holding the rings together failed.

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Astronomical rings

Early astronomical instrument

Diagram of astronomical rings (Johannes Dryander, Annulorum trium diversi generis..., published Marburg, 1537)

Astronomical rings (Latin: annuli astronomici),[1] also known as Gemma's rings, are an early astronomical instrument. The instrument consists of three rings, representing the celestial equator, declination, and the meridian.

It can be used as a sun dial to tell time, if the approximate latitude and season is known, or to tell latitude, if the time is known or observed (at solar noon). It may be considered to be a simplified, portable armillary sphere, or a more complex form of astrolabe.


Parts of the instrument go back to instruments made and used by ancient Greek astronomers. Gemma Frisius combined several of the instruments into a small, portable, astronomical-ring instrument. He first published the design in 1534,[2] and in Petrus Apianus's Cosmographia in 1539. These ring instruments combined terrestrial and celestial calculations.[3]


Fixed astronomical rings[edit]

Fixed astronomical rings are mounted on a plinth, like armillary spheres, and can be used as sundials.

Traveller's sundial or universal equinoctal ring dial[edit]

The dial is suspended from a cord or chain; the suspension point on the vertical meridian ring can be changed to match the local latitude. The time is read off on the equatorial ring; in the example below, the center bar is twisted until a sunray passes through a small hole and falls on the horizontal equatorial ring.

Sun ring[edit]

A sunring or farmer's ring is a latitude-specific simplification of astronomical rings. On one-piece sunrings, the time and month scale is marked on the inside of the ring; a sunbeam passing through a hole in the ring lights a point on this scale. Newer sunrings are often made in two parts, one of which slides to set the month; they are usually less accurate.

  • Diagram of a one-part sunring, with sunbeam

  • A two-part sunring or farmer's ring, with light beam showing the time

  • A simpler sundial ring, not in use

Sea ring[edit]

In 1610, Edward Wright created the sea ring, which mounted a universal ring dial over a magnetic compass. This permitted mariners to determine the time and magnetic variation in a single step.[4] These are also called "sundial compasses".

Structure and function[edit]

The three rings are oriented with respect to the local meridian, the planet's equator, and a celestial object. The instrument itself can be used as a plumb bob to align it with the vertical. The instrument is then rotated until a single light beam passes through two points on the instrument. This fixes the orientation of the instrument in all three axes.

The angle between the vertical and the light beam gives the solar elevation. The solar elevation is a function of latitude, time of day, and season. Any one of these variables can be determined using astronomical rings, if the other two are known.

The altitude of the sun does not change much in a single day at the poles (where the sun rises and sets once a year), so rough measurements of solar altitude don't vary with time of day at high latitudes.

Use as a calendar sundial[edit]

When the solar time is exactly noon, or known from another clock, the instrument can be used to determine the time of year.

The meridional ring can function as the gnomon, when the rings are used as a sundial. A horizontal line aligned on a meridian with a gnomon facing the noon-sun is termed a meridian line and does not indicate the time, but instead the day of the year. Historically they were used to accurately determine the length of the solar year. A fixed meridional ring on its own can be used as an analemma calendar sundial, which can be read only at noon.

When the shadow of the rings are aligned so that they appear to be in the same, or nearly the same, place, the meridian identifies itself.[clarification needed]

Meridional ring[edit]

The meridian ring is placed vertically, then rotated (relative to the celestial object) until it is parallel to the local north-south line. The whole ring is thus parallel to the circle of longitude passing through the place where the user is standing.

Because the instrument is often supported by the meridional ring, it is often the outermost ring, as it is in the traveller's rings illustrated above. There, a sliding suspension shackle is attached to the top of the meridional ring, from which the whole device can be suspended. The meridional ring is marked in degrees of latitude (0–90, for each hemisphere). When properly used, the pointer on the support points to the latitude of the instrument's location. This tilts the equatorial ring so that it lies at the same angle to the vertical as the local equator.[5][6]

Equatorial ring[edit]

The equatorial ring occupies a plane parallel to the celestial equator, at right angles to the meridian. It is aligned by

  • being attached to the meridional ring at the marking for latitude zero (see above)
  • being aligned to the declension ring, which is aligned to the celestial object.

Often equipped with a graduated scale, it can be used to measure right ascension. On the traveller's sundial shown above, it is the inner ring.

This ring is sometimes engraved with the months on one side and corresponding zodiac signs on the outside; very similar to an astrolabe. Others have been found to be engraved with two twelve-hour time scales. Each twelve-hour scale is stretched over 180 degrees and numbered by hour with hashes every 20 minutes and smaller hashes every four minutes. The inside displays a calendrical scale with the names of the months indicated by their first letters, with a mark to show every 5 days and other marks to represent single days. On these, the outside of the ring is engraved with the corresponding symbols of the zodiac signs. The position of the symbol indicates the date of the entry of the sun into this particular sign. The vernal equinox is marked at March 15 and the autumnal equinox is marked at September 10.[7]

Declination ring[edit]

Astronomical ring with an alidadeon the declination ring (folded closed).

The declination ring is moveable, and rotates on pivots set in the meridian ring. An imaginary line connecting these pivots is parallel to the Earth's axis. The declination "ring" of the traveller's sundial above is not a ring at all, but an oblong loop with a slider for setting the season.

This ring is often equipped with vanes and pinholes for use as the alidade of a dioptra (see image). It can be used to measure declination.

This ring is also often marked with the zodiac signs and twenty-five stars, similar to the astrolabe.


  1. ^"Annulus Astronomicus". Retrieved 2009-07-18.
  2. ^Sorgeloos, Claude (2001). "Un post-incunable retrouvé : L'Usus annuli astronomici de Gemma Frisius, Louvain et Anvers, 1534" [A post-incunabula discovery: 'The use of astronomical rings' by Gemma Frisius]. Quaerendo (in French). Leiden. 31 (4): 255–264. doi:10.1163/157006901X00155. ISSN 0014-9527. Retrieved 2009-07-19.
  3. ^Wallis, Helen (1984). "England's Search for the Northern Passages in the Sixteenth and Early Seventeenth Centuries". Arctic. 37 (4): 453–472. doi:10.14430/arctic2228. JSTOR 40510308.
  4. ^May, William Edward, A History of Marine Navigation, G. T. Foulis & Co. Ltd., Henley-on-Thames, Oxfordshire, 1973, ISBN 0-85429-143-1
  5. ^ Retrieved 2013-11-10
  6. ^"Mid 18th Century Brass Astronomical ring dial. - Gilai Collectibles".
  7. ^"Astronomical dial; ring-dial; sundial | British Museum". Archived from the original on 2013-11-12.



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