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Silver Coin
The Black Hole

Product No. 25331

€  69.60

*incl. 20% VAT
Maximum order quantity: 2
Availability Sold out

A unique coin for a unique phenomenon. Concave on one side and convex on the other, The Black Hole illustrates the funnel shape of these regions of spacetime where gravity is so strong that nothing can escape from them. One way of envisaging a black hole is as a vortex that draws in everything in its immediate proximity. Once beyond the point of no return – known as the ‘event horizon’ – the ‘singularity’ awaits at the centre. Stephen Hawking and Roger Penrose showed that this is a place where space-time curvature is infinite.

The interpretation of the black hole as a region of space from which nothing can escape was first published by American physics professor David Finkelstein in 1958. But it was not until 1971 that Cygnus X-1 became the first black hole to be named as such, having been identified by several researchers working independently.

Although storing vast amounts of energy, black holes do not emit light. For this reason, the first photograph of a black hole was not published until 2019 and, even then, only as an indirect image of the shadow it casts. No wonder that so much remains unclear about black holes. Among the most complex objects possible in our or any other universe, they are not only a challenge experimentally but also raise a multitude of fundamental questions about space and time.

Coin Motif

The black hole vortex phenomenon is illustrated on the coin’s reverse in the shape a funnel decorated with a colour-printed spiral. On the coin’s obverse, a cone rises from the flat silver surface, representing the curvature of space-time. ‘Cygnus X-1’, the name of the first black hole to be named as such, is written to the right under ‘15 M☉’, the solar mass of this black hole. In German, ‘Event horizon’ marks the boundary between the observable and the unobservable in space-time, while ‘Singularity’ points to the location of maximum space-time curvature.

Date of Issue 11 May 2022
Quality Proof
Series The Uncharted Universe
Face Value 20 Euro
Coin Design Mag. Helmut Andexlinger
Diameter 34.00 mm
Alloy Silver Ag 925
Fine Weight 20.74 g / 0.67 oz
Total Weight 22.42 g
Packaging Comes in a case complete with a numbered certificate of authenticity and protective slipcase
Year Uncirculated Proof Special Uncirculated
2022 30,000

A unique coin for a unique phenomenon. Concave on one side and convex on the other, The Black Hole illustrates the funnel shape of these regions of spacetime where gravity is so strong that nothing can escape from them. One way of envisaging a black hole is as a vortex that draws in everything in its immediate proximity. Once beyond the point of no return – known as the ‘event horizon’ – the ‘singularity’ awaits at the centre. Stephen Hawking and Roger Penrose showed that this is a place where space-time curvature is infinite.

The interpretation of the black hole as a region of space from which nothing can escape was first published by American physics professor David Finkelstein in 1958. But it was not until 1971 that Cygnus X-1 became the first black hole to be named as such, having been identified by several researchers working independently.

Although storing vast amounts of energy, black holes do not emit light. For this reason, the first photograph of a black hole was not published until 2019 and, even then, only as an indirect image of the shadow it casts. No wonder that so much remains unclear about black holes. Among the most complex objects possible in our or any other universe, they are not only a challenge experimentally but also raise a multitude of fundamental questions about space and time.

Coin Motif

The black hole vortex phenomenon is illustrated on the coin’s reverse in the shape a funnel decorated with a colour-printed spiral. On the coin’s obverse, a cone rises from the flat silver surface, representing the curvature of space-time. ‘Cygnus X-1’, the name of the first black hole to be named as such, is written to the right under ‘15 M☉’, the solar mass of this black hole. In German, ‘Event horizon’ marks the boundary between the observable and the unobservable in space-time, while ‘Singularity’ points to the location of maximum space-time curvature.

Date of Issue 11 May 2022
Quality Proof
Series The Uncharted Universe
Face Value 20 Euro
Coin Design Mag. Helmut Andexlinger
Diameter 34.00 mm
Alloy Silver Ag 925
Fine Weight 20.74 g / 0.67 oz
Total Weight 22.42 g
Packaging Comes in a case complete with a numbered certificate of authenticity and protective slipcase
Year Uncirculated Proof Special Uncirculated
2022 30,000

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