Dawn, dusk and twilight | Meanings and Timings - Royal Museums …
网页Learn how astronomers define sunrise, sunset and twilight, and how they vary throughout the year. Find out the difference between civil, nautical and astronomical twilight, and why the earliest sunrise is not on the longest day.
Is noon 12 am or 12 pm? - Royal Museums Greenwich
网页Learn the difference between noon and midnight, and why they are not the same as 12 am or 12 pm on a 12-hour clock. Discover the history and science of time and space at the home of Greenwich Mean Time.
Space race timeline - Royal Museums Greenwich
网页2021年2月20日 · Learn about the key events and achievements that shaped the 20th Century competition between the US and the USSR for space supremacy. The space race started on 2 August 1955, when the USSR responded to the US announcement of their intent to launch the first artificial satellite.
What is the Prime Meridian - and why is it in Greenwich?
网页Learn why the Prime Meridian, the imaginary line that separates east and west, is in Greenwich and how it was chosen. Explore the history of the Royal Observatory, the instruments that defined the Meridian and the global …
Royal Museums Greenwich | Home
网页Explore the history, art and science of Greenwich at four iconic attractions: the Royal Observatory, Cutty Sark, National Maritime Museum and Queen's House. Book tickets, plan your visit and discover online stories and collections.
History of Antarctic explorers | Royal Museums Greenwich
网页Learn about the history of Antarctic exploration from first sighting to reaching the South Pole, and the 'race' to the pole by Scott, Amundsen and Shackleton. The web page covers the key events, expeditions, discoveries and challenges of polar exploration from the 7th century to the present day.
What did Galileo discover? - Royal Museums Greenwich
网页Learn about the discoveries and inventions of the Italian astronomer Galileo, who used the telescope to observe the Moon, Venus, Jupiter and the Milky Way. Find out which three planets he observed and how they challenged the geocentric view of the universe.
What is Greenwich Mean Time (GMT) - and why does it matter?
网页Learn how Greenwich Mean Time (GMT) became the international standard of civil time and the basis for the global system of time zones. Discover the history, definition and significance of GMT and its relation to the Prime Meridian …
RMS Titanic facts - Royal Museums Greenwich
网页2019年4月15日 · Learn about the history, design and fate of the RMS Titanic, the largest and most famous ship of its time. Find out how it differed from its sister ships Olympic and Britannic, and what life was like on board.
What is a blue moon? - Royal Museums Greenwich
网页A blue moon is not a rare or colourful phenomenon, but a full moon that occurs twice in one calendar month or in a season with four full moons. Learn the history, meanings and future dates of blue moons from the Royal Observatory Greenwich.