 |  ESA sets clock by distant spinning stars
 28 December 2018
ESA’s technical centre in the Netherlands has begun running a pulsar-based clock. The
‘PulChron’ system measures the passing of time using millisecond-frequency radio pulses
from multiple fast-spinning neutron stars. Operating since the end of November, this
pulsar-based timing system is hosted in the Galileo Timing and Geodetic Validation
Facility of ESA’s ESTEC establishment, at Noordwijk in the Netherlands, and relies on
ongoing observations by a five-strong array of radio telescopes.
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