The Nautical Almanac

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Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Small, white rat (genus Rattus) on a glass table. (rodent, laboratory, experiment)

Cruel and Unusual Punishments: 15 Types of Torture

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd

Causes of the Great Depression

Entrants falling and tumbling over while chasing the cheese at the 2016 'Cheese Rolling' held at Cooper's Hill, in the Cotswolds, Brockworth England

7 of the World’s Most Dangerous Festivals

Titanic infographic. The 30th anniversary of its discovery is September 1, 2015. SPOTLIGHT VERSION.

Timeline of the Titanic’s Final Hours

African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

Timeline of the American Civil Rights Movement

The Nautical Almanac

British publication

Learn about this topic in these articles:

contribution to 18th-century navigation

In navigation: Almanacs and tables
…were published in the annual Nautical Almanac, which was inaugurated in 1766.
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publication by Royal Greenwich Observatory

In Royal Greenwich Observatory
The observatory began publishing The Nautical Almanac (1766, with data for 1767), which established the longitude of Greenwich as a baseline for time calculations. The almanac’s popularity among navigators led in part to the adoption in 1884 of the Greenwich meridian as the Earth’s prime meridian (0° longitude) and…
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