Astronomy Picture of the Day · October 29, 1999

The USNO Millennium Time Ball

The Astronomy Picture of the Day for October 29, 1999 is “The USNO Millennium Time Ball,” an image. It is credited to Credit: United States Naval Observatory. The original explanation runs about 154 words.

From the explanation

“In the nineteenth century , dropping a time ball from a prominent location was a practical way of communicating the time to the surrounding country side and ships at sea . S.”

— APOD editors, October 29, 1999

Read the full explanation on science.nasa.gov

At a glance

Date: October 29, 1999
Type: Image
Credit: Credit: United States Naval Observatory
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 154 words

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On this day: October 29 in other years

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Source

Astronomy Picture of the Day, October 29, 1999 — science.nasa.gov/image-article/apod-1999-october-29-the-usno-millennium-time-ball

Copy taken Oct 28, 2026, 2:39 AM EDT. The image and explanation belong to their creators. OpenOrbit is not affiliated with or endorsed by NASA.