Solar time, sundials and Greenwich Mean Time

Описание: For centuries, humans have relied on the sun for timekeeping. You can tell from its height above the horizon and its position roughly how many hours of daylight you have. And for most people, that's fine. But for astronomers, solar time is too variable, It's incredibly inaccurate and not exactly 24 hours. This is why astronomers at the Royal Observatory Greenwich created an average or mean day of exactly 24 hours. So Greenwich Mean Time is solar time, measured by a Greenwich astronomer, that's averaged out into a mean time that you can use with a clock.

–
Learn more ➤ https://www.newscientist.com/video/24...

Subscribe ➤ https://bit.ly/NSYTSUBS

Get more from New Scientist:
Official website: https://bit.ly/NSYTHP
Facebook: https://bit.ly/NSYTFB
Twitter: https://bit.ly/NSYTTW
Instagram: https://bit.ly/NSYTINSTA
LinkedIn: https://bit.ly/NSYTLIN

About New Scientist:
New Scientist was founded in 1956 for “all those interested in scientific discovery and its social consequences”. Today our website, videos, newsletters, app, podcast and print magazine cover the world’s most important, exciting and entertaining science news as well as asking the big-picture questions about life, the universe, and what it means to be human.

New Scientist
https://www.newscientist.com/