Shepherd Gate Clock
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The Shepherd Gate Clock is mounted on the wall outside the gate of the Royal Observatory, Greenwich building in Greenwich, Greater London. The clock, an early example of an electrically connected cloc
The Shepherd Gate Clock at the entrance to the Royal Observatory, Greenwich. It shows Greenwich Mean Time all year round.
Mechanism of the clock – on display but not in use
Flamsteed House (with its red time ball) overlooks the Gate clock, 1960
George Biddell Airy
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Sir George Biddell Airy was an English mathematician and astronomer, as well as the Lucasian Professor of Mathematics from 1826 to 1828 and the seventh Astronomer Royal from 1835 to 1881. His many ach
George Biddell Airy in 1891
George Biddell Airy
Airy's Transit Circle in the Transit Circle Room of the Royal Greenwich Observatory; for a hundred years from 1884 to 1984, it marked the Prime meridian of the world, or more accurately, the Prime Meridian was marked by or derived from it.
The Prime Meridian in Greenwich (1884–1984); the telescope shown above left is behind the glass