How astronomers defined time and Earth's rotation 🕛️🌍️ John Flamsteed, the first Astronomer Royal at the Royal Observatory, Greenwich in London, would measure solar time using a sundial and then apply the so-called equation of time to create Greenwich Mean Time, an average that could account for inaccuracies in solar time. He also measured the daily crossing of the bright star Sirius as it crosses the meridian every 23 hours and 56 minutes. This gave him very regular and consistent rates. And
1:30
How astronomers defined time and Earth's rotation 🕛️🌍️ John Flamsteed, the first Astronomer Royal at the Royal Observatory, Greenwich in London, would measure solar time using a sundial and then apply the so-called equation of time to create Greenwich Mean Time, an average that could account for inaccuracies in solar time. He also measured the daily crossing of the bright star Sirius as it crosses the meridian every 23 hours and 56 minutes. This gave him very regular and consistent rates. And
2K viewsMay 6, 2025
FacebookNew Scientist
On 4 March 1675, John Flamsteed was appointed England’s first Astronomer Royal by Charles II. Charged with mapping the heavens for navigation, he later worked from the new Royal Observatory at Greenwich. His star catalogues transformed astronomy and helped guide Britain’s sailors across the oceans. ⸻ #onthisday #JohnFlamsteed #AstronomerRoyal #RoyalObservatory #londonhistory
1:10
On 4 March 1675, John Flamsteed was appointed England’s first Astronomer Royal by Charles II. Charged with mapping the heavens for navigation, he later worked from the new Royal Observatory at Greenwich. His star catalogues transformed astronomy and helped guide Britain’s sailors across the oceans. ⸻ #onthisday #JohnFlamsteed #AstronomerRoyal #RoyalObservatory #londonhistory
246 views2 months ago
TikTokadam.shipway
The Visionary Astronomer: How One Scientist Mapped the Stars and Guided Explorers.
0:52
The Visionary Astronomer: How One Scientist Mapped the Stars and Guided Explorers.
880 views10 months ago
YouTubeHidden History Revealed
How to Become an Astronomer
How to Become an Astronomer
384.7K views2 months ago
wikiHowwikiHow Staff
“We’ve actually got scientific observations of the night sky that go back, not thousands of years like we have in Western astronomy, but tens of thousands. Sixty thousand years of looking at the night sky.” Peter Swanton is bringing the observations of Australia’s first astronomers into the bigger picture of Western astronomy. | SBS Australia
3:28
“We’ve actually got scientific observations of the night sky that go back, not thousands of years like we have in Western astronomy, but tens of thousands. Sixty thousand years of looking at the night sky.” Peter Swanton is bringing the observations of Australia’s first astronomers into the bigger picture of Western astronomy. | SBS Australia
10.4K viewsJun 30, 2021
FacebookSBS Australia
Astronomers Observe the First-Ever Birth of a Solar System
0:55
Astronomers Observe the First-Ever Birth of a Solar System
9 months ago
MSNCover Media US
Astronomers snap the first image of the black hole at the center of our galaxy | Space and Technology
1:02
Astronomers snap the first image of the black hole at the center of our galaxy | Space and Technology
488.8K viewsMay 13, 2022
FacebookSpace and Technology
1:59
10 Fascinating Facts About the First Astronomers
503 views4 months ago
YouTubeExcedence
1:38
Discovering The First Astronomers And Their Amazing Legacy! #shorts
596 viewsApr 25, 2025
YouTubeFactInquisitor
0:34
The First Mapping of the Stars l Cosmic History EP1 #space
603 views1 month ago
YouTubeAY Beyond
2:39
Early Astronomers
29K viewsApr 10, 2012
YouTubeAmy Leniart
11:39
History of Astronomy Part 1: The Celestial Sphere and Early Observations
266.5K viewsOct 4, 2018
YouTubeProfessor Dave Explains
12:35
The New Astronomy: Crash Course History of Science #13
491.8K viewsJul 9, 2018
YouTubeCrashCourse
2:53:05
How Did Humans Start Exploring The Stars? (The History of Astronomy)
493 views8 months ago
YouTubeThe Sleepy Astronomer
13:06
The History of Astronomy in the Ancient World
41.5K viewsMay 17, 2022
YouTubeWorld History Encyclopedia
4:57
The First Astronomer
144 views11 months ago
YouTubeCarolyn Day
5:24
History of Astronomy Part 2: Early Measurements of the Earth
96.3K viewsOct 11, 2018
YouTubeProfessor Dave Explains
8:03
Ancient Civilisations that Studied Astronomy
55.6K viewsDec 23, 2020
YouTubeBeeyond Ideas
56:14
The Early Universe - Professor Carolin Crawford
100.3K viewsFeb 11, 2015
YouTubeGresham College
2:05
Astronomer - Career Video, 1st Grade
18.9K viewsJun 15, 2020
YouTubeYes! Our Kids Can
8:27
Astronomy: Explained | Astronomic
121.6K viewsJul 7, 2015
YouTubeAstronomic
8:52
Models of the Universe [Geocentric to Heliocentric]
438.8K viewsSep 26, 2012
YouTubeMike Sammartano
7:57
Exploring the Stars: Journey Through Famous Astronomers
106 viewsApr 29, 2025
YouTubeHistory no Mystery
24:26
How did we measure the fastest speed there is? | The History of the Speed of Light Part I
939.8K viewsDec 4, 2019
YouTubeDr. Becky
51:37
A Brief History of Astronomy
890.6K viewsNov 29, 2022
YouTubeNaked Science
35:58
The Truth About the First Moon Landing
89.5K views2 weeks ago
YouTubeAstrum Extra
8:46
A Day In The Life Of An Astronomer
204K viewsJan 29, 2016
YouTubeUKAstroNut
35:06
Buying Your First Telescope...All You Need To Know.
127.8K viewsJun 8, 2021
YouTubeSmall Optics
6:01
All of Astronomy in 6 minutes
494.7K viewsJun 29, 2020
YouTubeSciencephile the AI
9:01
First Light: The Dark Age of the Universe
115.3K viewsOct 6, 2012
YouTubeDeep Astronomy
See more