One of the favorite topics of our news is about moon landing. So, on this day (on September 20, 1970) the Soviet Union's Luna 16 moon probe landed on the moon.
The smallest atomic clocks became commercially available, their price ranges from $1500. As the size of a matchbook, the new clock is 100 times smaller than its predecessor.It would be interesting to note that the tiny atomic clocks were developed by a team of researchers from Symmetricom Inc. Draper Laboratory and Sandia National Laboratories. Called Chip Scale Atomic Clock (CSAC), the device consumes only 100 mW. Itoperates by calculating the velocity of electromagnetic waves emitted by cesium atoms, if they fell under the impact of a tiny laser beam. Although in fact the clock is not show time, the creators claim that the device can be used in various applications.
For example, miners and divers, who can not use GPS-device would be able to plan the precise operation with remote team members. This is due to the fact that their timing will diverge less than a millionth of a second per day. It is worth noting that the project was funded by DARPA.