Images Vidéos

Observatoire naval US Photos ❘ Science Photo Library

US Naval Observatory time signaller, 1913
12324640 - US Naval Observatory time signaller, 1913
IBM 650 computer at US Naval Observatory, 1961
12347497 - IBM 650 computer at US Naval Observatory, 1961
Time Service at US Naval Observatory, 1935
12347500 - Time Service at US Naval Observatory, 1935
Time determination at US Naval Observatory
12347501 - Time determination at US Naval Observatory
15-inch equatorial telescope at US Naval Observatory
12347498 - 15-inch equatorial telescope at US Naval Observatory
US Naval Observatory refractor telescope, 19th century
12347493 - US Naval Observatory refractor telescope, 19th century
Time Service at US Naval Observatory, 1915
12347499 - Time Service at US Naval Observatory, 1915
US Naval Observatory time signalling antennas
12347502 - US Naval Observatory time signalling antennas
US Naval Observatory
11637008 - US Naval Observatory
Dome of the US Naval observatory in Arizona
11880025 - Dome of the US Naval observatory in Arizona
US Naval Observatory,Washington,DC
12014210 - US Naval Observatory,Washington,DC
Astronomical Clock, US Naval Observatory
13502376 - Astronomical Clock, US Naval Observatory
Elizabeth Roemer, US astronomer
12349335 - Elizabeth Roemer, US astronomer
William Eichelberger,US astronomer
12099796 - William Eichelberger,US astronomer
Edgar Frisby,US astronomer
11641948 - Edgar Frisby,US astronomer
Asaph Hall III,US astronomer
11595117 - Asaph Hall III,US astronomer
Asaph Hall Jr,US astronomer
11591285 - Asaph Hall Jr,US astronomer
Asaph Hall III,US astronomer
11591283 - Asaph Hall III,US astronomer
USNO solar eclipse expedition, 1925
13477025 - USNO solar eclipse expedition, 1925
Hall's discovery of the moons of Mars, 1877
12347494 - Hall's discovery of the moons of Mars, 1877
1874 Transit of Venus observers
12347492 - 1874 Transit of Venus observers
Transit circle observations, 1924
12347495 - Transit circle observations, 1924
Photoheliograph, 1888
12347491 - Photoheliograph, 1888
Transit circle tracking device, 20th century
12347496 - Transit circle tracking device, 20th century
Longitude determination, 1913
12347503 - Longitude determination, 1913
USNO solar eclipse expedition,1925
11618213 - USNO solar eclipse expedition,1925
Caesium beam atomic clocks,1984
11730382 - Caesium beam atomic clocks,1984
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