Old Naval Observatory Position

Old Naval Observatory

Observatory in Washington, D.C., United States
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Its mission includes determining the positions and motions of the Earth, Sun, Moon, planets, stars and other celestial objects; providing …

Facts

Located:23rd Street and E Street, N.W., Washington, D.C.
Construction completed:1844
Architect:James Melville Gilliss

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Frequently asked questions

Q:
What Causes the Equation of Time?
A:
First, it is important to realize that all of our modern timekeeping systems ultimately have been based on the apparent daily motion of celestial objects in the sky, with...
A:
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