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Tag Archives: atomic clocks
A laser worthy of a nuclear clock
The nucleus of the thorium-229 isotope has a special property: it has an excited state that’s incredibly close in energy to its ground state. The existence of such an isomer is remarkable because when nuclei normally get excited, they need … Continue reading
A tribute to rubidium
And to Paul Feyerabend Continue reading
The clocks that used atoms and black holes to stay in sync
You’re familiar with clocks. There’s probably one if you look up just a little, at the upper corner of your laptop or smartphone screen, showing you what time of day it is, allowing you to quickly grasp the number of … Continue reading
Posted in Scicomm
Tagged atomic clocks, caesium standard, caesium-133, Event Horizon Telescope, frequency comb, hydrogen maser, International Celestial Reference Frame, Kashima, Koganei, Medicine, microwave clocks, Milky Way, optical atomic clocks, quasars, radio telescopes, SI units, strontium clock, uncertainty, Very-Long Baseline Interferometry, VLBI, ytterbium clock
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What is VLBI?
On June 25, scientists announced the discovery of a trio of supermassive black holes at the center of a galaxy 4.2 billion light years away. The find was credited to the European VLBI Network. A Space.com report stated that this … Continue reading