2025 20 Euro The Beauty of the Universe - Einstein Ring Coloured Silver Proof Coin

Name: 2025 20 Euro The Beauty of the Universe - Einstein Ring Coloured Silver Proof Coin
Brand: Austrian Mint
SKU: TCC221604
Price: 108.64 USD
Availability: OutOfStock

Austrian Mint

SKU:

TCC221604

US$108.64

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The Coin Company is proud to present 2025 20 Euro The Beauty of the Universe - Einstein Ring Coloured Silver Proof Coin by the Austrian Mint

They may not really exist, but Einstein rings can actually be seen – when light from a galaxy or star is diverted by a massive object en route to Earth. Albert Einstein himself never actually saw one and thought it unlikely that the phenomenon bearing his name would ever be observed. The man synonymous with the term ‘genius’ was not wrong about many things, but he was wrong about this, as the first Einstein ring was discovered in 1979, some 24 years after the iconic scientist’s death, 70 years ago this year. The second coin in The Beauty of the Universe series, the Einstein Ring provides remarkable insights into the curvature of space-time and this very special galactic curiosity, making it the perfect gift for astronomy enthusiasts of all ages.

According to Einstein’s general theory of relativity, gravity is only one aspect of the geometry of space-time. When a solid body bends space, light is deflected, making it seem to come from different places, such as the edge of a cluster of galaxies. In reality, the light’s source lies exactly behind it and the galaxy is one and the same, not one of several.

A circular wave curves upwards on the obverse of the coin. Representing an Einstein ring, this is the pictorial multiplication of the light source on the left. Between the light source and the observer, a cluster of galaxies is simplified in the centre, which deflects the light many times due to its gravity. The German for ‘gravitational lens’ refers to its function in this context. The formula Δ∅=4GM/bcÇ, which can be used to calculate the deflection of light, completes the design. The coin’s reverse has the same basic shape as the obverse but features a colour-printed interpretation of an Einstein ring.

2025 20 Euro The Beauty of the Universe - Einstein Ring Coloured Silver Proof Coin has a limited mintage of 30,000 coins.

Product Availability - Late May 2025