Tuesday, June 30, 2015

'Leap Second' Tue. Evening Due to Slowing Earth Rotation Rate

Portal icon
Pocket watch, savonette-type. (Image Source: Wikipedia.org ; Photograph by Isabelle Grosjean)

By Glenn A. Walsh
Reporting for SpaceWatchtower

On Tuesday evening, our clocks will slow down by a second, to match the slowing of the rotation rate of the Earth. At 7:59:59 p.m. Eastern Daylight Saving Time (EDT) / 23:59:59 Coordinated Universal Time (UTC) on Tuesday Evening, 2015 June 30, an additional second will be added to the civil time scale just before the month of July officially begins according to Coordinated Universal Time, the international time scale used by many scientists.

Known as a “Leap Second,” one second is added to the time scale, periodically, either at the very end of June or the very end of December. Since the first Leap Second was added in 1972, 25 Leap Seconds have been added, the last one in June of 2012.

More - Link >>> http://spacewatchtower.blogspot.com/2015/01/slowing-of-rotation-rate-necessitates.html

Source: Glenn A. Walsh Reporting for SpaceWatchtower, a project of Friends of the Zeiss.

Want to receive SpaceWatchtower blog posts in your inbox ?
Send request to < spacewatchtower@planetarium.cc >..

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://buhlplanetarium.tripod.com/fotz/ >
Electronic Mail - < gawalsh@planetarium.cc >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >
Also see: South Hills Backyard Astronomers Blog: < http://shbastronomers.blogspot.com/ >
Barnestormin: Writing, Essays, Pgh. News, & More: < http://www.barnestormin.blogspot.com/ >
About the SpaceWatchtower Editor / Author: < http://buhlplanetarium2.tripod.com/weblog/spacewatchtower/gaw/ >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < https://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
  < http://www.planetarium.cc >
* Adler Planetarium, Chicago:
  < http://adlerplanetarium.tripod.com >
* Astronomer, Educator, Optician John A. Brashear:
  < http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
  < http://www.andrewcarnegie.cc >
* Civil War Museum of Andrew Carnegie Free Library:
  < http://garespypost.tripod.com >
* Duquesne Incline cable-car railway, Pittsburgh:
  < http://inclinedplane.tripod.com >
* Public Transit:
  < http://andrewcarnegie2.tripod.com/transit >

No comments:

Post a Comment