Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    A good clock for a few billion years
    From: Frank Reed
    Date: 2019 May 5, 09:03 -0700

    The world's most precise clock sits on a table in Jun Ye’s lab in Boulder, Colorado. A tangle of electronics, fiber-optic cables, and laser beams, the clock is still a prototype, so no one actually uses it to tell time. Ye, a physicist at the research institute JILA, and his team have demonstrated that the clock can produce a second with precision in the parts per quintillion—that’s 10¹⁹, some hundred billion times more precise than a quartz wristwatch. Put another way, if the clock had started ticking at the Big Bang, by today it would have lost or gained no more than a second. It’s not just the most precise clock in the world—it’s the most precise device in the world.

    Read the article

    Frank Reed

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site