More Evidence for Noon as Start of Day?

February 3, 2014 at 11:42 pm Leave a comment

by Milky Way Maid

Dave over at AstroAmerica.com keeps harping on using noon as the start of the day in the pre-railroad era. He tends to run a chart both for the stated time, which assumes that the legal began at midnight, and a chart for 12 hours later which assumes that the day began at noon since it was a verifiable event.

I have just run across something that tends to support noon as a verifiable event, a verifiable astronomical event — because ships for example would reset their clocks to an authoritative source.

The fact is that beginning in 1845, at the request of the Secretary of the Navy, the Navy Observatory dropped a ball precisely at noon. This ball was installed at the telescope dome, and was apparently visible even to ships in the Potomac River. The ships would set their clocks before putting out to sea.

This system apparently stayed in force until the adoption of Ephemeris time in 1956, and later the adoption of Dynamical time in 1984 (a measure of time based on the motion of the celestial bodies).

For the original source please dial your browser to the Navy website at http://www.USNO.navy.mil/about.shtml.

 

Advertisements

Entry filed under: Astronomy Notes on the Web, Coolest Web Links. Tags: , , , , , .

Your Milky Way Horoscope Feb. 2-8, 2014 Your Milky Way Horoscope Feb. 9-15, 2014

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Trackback this post  |  Subscribe to the comments via RSS Feed


SUBJECT: Find Unlimited Books for Your Ebook Reader

Hi, If you want Unlimited Access and Unlimited Downloads for your cool, new Ebook Reader, you're gonna love this! http://www.Free-eBooks.net/5191-0-5-6.html There's a huge online library that gives you access to ALL formats for any Ebook Reader! It provides unlimited reading for Amazon Kindle, BN's Nook, SONY Reader and, of course, Apple's latest, The iPad. They've got thousands of books, fiction and non-fiction,for you to choose from. I just thought it was amazing how much free content, help and information was available -- all at the click of a mouse! Again, it's at: http://www.Free-eBooks.net/5191-0-5-6.html To grab your Ebook format, you simply enroll as a V.I.P.,with a nominal donation to support admin of the site and service to get complete 1st Class treatment and Unlimited Access and Downloads (for a year or even a lifetime). Hope this helps you load up your Ebook Reader, from Milky Way Maid P.S. You can also register at NO cost for a Standard Membership that just lets you read books online in any Internet Browser and download up to 5 ebooks in PDF format every month. Best to look here, for all the details: http://www.Free-eBooks.net/5191-0-5-6.html

Announcing …

Additional Options

Categories

A gift to my lovely readers —

As a special gift to my readers I thought you might enjoy some background music. A terrific writer and geek found these archived radio recordings of the Beatles for a Swedish radio show way back when. He cleaned them up a bit and edited them, and here they are. Five songs in cool condition. So turn up the volume alright already.

_uacct = “UA-3989433-1″; urchinTracker();

Please visit a new friend

Hi, The people at throwbackfootballjerseys.net have kindly added me on their Blog Awards listing. Thanks so much for the link, Sheila! Please visit them at the address above or at their index page at http://throwbackfootballjerseys.net/index.php. Lots and lots of high-quality clothing with beautiful renditions of sports logos. THE place to go for team wear for you and your pet. Thanks again.

%d bloggers like this: