second: References & Edit History
More Articles On This Topic
Article Contributors
Primary Contributors
-
Jonathan D. Betts
Curator of Horology, Royal Observatory Greenwich, National Maritime Museum.
Other Encyclopedia Britannica Contributors
Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Modified link of Web site: National Physical Laboratory - Second (s). | Oct 15, 2025 | ||
| Add new Web site: PTB Braunschweig - Time the SI Base Unit Second (PDF). | Jul 05, 2025 | ||
| Add new Web site: LiveScience - How long is a second? | Apr 27, 2024 | ||
| Add new Web site: National Physical Laboratory - Second (s). | Dec 15, 2023 | ||
| Add new Web site: Physics LibreTexts - Same Unit for Space and Time- Meter, Second, Minute, or Year. | Nov 01, 2023 | ||
| Add new Web site: Fact Monster - Science - Second. | Feb 11, 2011 | ||
| Article revised and updated. | Jan 25, 2007 | ||
| Article revised. | Apr 29, 2004 | ||
| Article added to new online database. | Jul 20, 1998 |
View Changes:
Article History
Revised:
By: