John Pond Biography and Timeline

Astronomer Royal Appointed

Takes charge of Greenwich Observatory after Maskelyne.

Role range: 1811-1835

John Pond Appointed Astronomer Royal

Pond succeeded Maskelyne and continued programmes of astrometry at the national observatory. The development became important to surveying and nautical charts.

John Pond Succeeds Maskelyne

John Pond became Astronomer Royal and concentrated on accurate observation and instrumentation.

Meridian Instrument Programme Expanded

Pond worked to improve the accuracy and throughput of star transit observations. Its influence reached maritime practice beyond the Observatory itself.

Pond Expands Transit Instrument Programme

Pond's administration improved the systematic observation of stellar transits and declinations.

Star Catalogue Precision Receives New Emphasis

Astronomical cataloguing increasingly used large sets of repeat measurements to reduce random errors. The episode illustrates the growing value of calibrated scientific instruments.

Greenwich Time Ball Begins Operation

A visible time signal was installed to enable ships on the Thames to adjust their chronometers. This made positional observations more useful to navigators.

Time Ball Provides Harbour Signal

The Greenwich time ball allowed vessels on the Thames to check marine chronometers against a visible daily signal.

Greenwich Time Ball Installed

The Observatory installed a rooftop time ball to give ships on the Thames a visible daily time signal.