Very first €20 commemorative coin Austria 2025 silver from the series ''The beauty of the Universe ''
| Size | XS | S | M | L |
|---|---|---|---|---|
| Euro | 32/34 | 36 | 38 | 40 |
| USA | 0/2 | 4 | 6 | 8 |
| Bust(in) | 31-32 | 33 | 34 | 36 |
| Bust(cm) | 80.5-82.5 | 84.5 | 87 | 92 |
| Waist(in) | 24-25 | 26 | 27 | 29 |
| Waist(cm) | 62.5-64.5 | 66.5 | 69 | 74 |
| Hips(in) | 34-35 | 36 | 37 | 39 |
| Hips(cm) | 87.5-89.5 | 91.5 | 94 | 99 |
With your arms relaxed at your sides, measure around the fullest part of your chest.
Measure around the narrowest part of your natural waist, generally around the belly button. To ensure a comfortable fit, keep one finger between the measuring tape and your body.
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The Austrian Mint continues its fascinating "Beauty of the Universe" series, dedicated to five exceptional physico-astronomical phenomena. The second issue, entitled "Einstein's Ring", highlights a spectacular effect of general relativity: gravitational lensing, which occurs when light from a galaxy or star is bent by the gravity of a massive object on its way to Earth.
The colorized sterling silver coin features a striking artistic representation of an Einstein ring. On the obverse, the light source is visible on the left, while in the center, a schematized cluster of galaxies acts as a gravitational lens, deflecting the light rays. This multiple deflection creates a spectacular optical illusion, illustrated here by the apparent multiplication of the source.
The scientific element is reinforced by the inscription of the formula ∆∅ = 4GM / bc², which quantifies this light deviation according to the principles of general relativity. The visual is completed by the official words: "REPUBLIK ÖSTERREICH", the face value of 20 EURO, and the year of issue 2025.
On the reverse of the coin, Einstein's ring is reproduced in vivid color, illustrating the phenomenon observed when a galaxy perfectly aligned with a massive object (such as a cluster of galaxies) produces a complete ring of light, captured by terrestrial telescopes.
Although Albert Einstein predicted this effect with his theory of general relativity, he considered its observation improbable. However, the first Einstein ring was identified in 1979, proving that light can indeed be deflected by gravity, giving the illusion of coming from multiple directions when in fact it comes from a single source, perfectly aligned behind the deflecting object.
In an ideal, perfectly symmetrical universe, a spherical galactic cluster would cause all the light rays emitted by the source to be regularly deflected. Each ray perceived by the observer would thus form a complete ring structure, like the one finely illustrated on this collector's piece.
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