A clock that remains accurate for one billion years.
The Chinese have launched an atomic clock (with an unfortunate acronym in English, CACS) into space that’s more accurate than any existing timekeeping technology, including solar calendars systems. It will lose 1 second after 1 billion years.
Take that Switzerland!
China’s new space laboratory has an atomic clock which, Chinese engineers say, is more accurate than the best timepiece operated by America’s National Institute of Standards and Technology.
The device, called Cacs, or Cold Atomic Clock in Space, was launched this weak along with other instruments of the Tiangong-2, China’s second orbital lab. According to the South China Morning Post, it will slow down by only one second in a billion years. In comparison, the NIST-F2 atomic clock, which serves as the United States’ primary time and frequency standard, loses a second every 300 million years.