Meridian photo tradition continues despite producing zero scientific benefit
Staff at the Royal Observatory Greenwich have confirmed that the enduring visitor tradition of straddling the Prime Meridian line for a photograph, one foot in the Eastern Hemisphere and one in the Western, produces no measurable scientific, personal, or geographic benefit whatsoever, and yet remains, by a wide margin, the most popular activity on site.
“People queue for it,” said one observatory guide. “Sometimes for twenty minutes, just to stand on a painted brass line and take a photo. It doesn’t do anything. It’s not a real border in any functional sense. It’s just extremely popular, and we’ve made peace with that.”
The observatory, founded in 1675 by King Charles II specifically to improve navigation at sea through more accurate astronomical charting, became the internationally agreed reference point for the Prime Meridian in 1884, following a conference in Washington, D.C. at which delegates from around the world agreed that longitude would be measured from Greenwich, a decision that also established Greenwich Mean Time as the world’s principal time reference.
The observatory’s red time ball, mounted atop the building and dropped daily at exactly 1pm since 1833, was installed specifically so that ships moored on the Thames could set their maritime chronometers accurately by sight, a system that predates radio time signals by decades and remains, staff confirm, still functionally operational today, largely for demonstrative purposes.
The climb up Greenwich Park’s hill to reach the observatory, while modest by London standards, has become something of an informal fitness test among visitors, with the reward at the top including sweeping views across the Old Royal Naval College, the Thames, and the Canary Wharf skyline beyond, a vista staff say “earns the climb, even on the days people arrive complaining about it.”
Greenwich Mean Time, while retaining its symbolic importance, was superseded for most technical and scientific purposes decades ago by Coordinated Universal Time, a distinction observatory staff say is “true, accurate, and something we generally don’t lead with when people are excited about being at the centre of time itself.”
The Peter Harrison Planetarium, added to the observatory complex in 2007, hosts regular shows on astronomy and space exploration, drawing particularly strong attendance from school groups whose questions afterward, staff note, “range from genuinely excellent to enthusiastically unrelated to anything covered in the show.”
Current visitor information, ticketing, and opening hours are published by Royal Museums Greenwich at https://www.rmg.co.uk. Greenwich Park’s wider visitor guidance is maintained by the Royal Parks at https://www.royalparks.org.uk, and the site’s UNESCO World Heritage status is documented at https://whc.unesco.org.
The observatory’s historic Octagon Room, designed by Christopher Wren specifically for astronomical observation, retains much of its original 17th-century character, with staff noting the room’s tall windows were positioned deliberately to allow clear sightlines for the era’s early telescopic instruments.
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