Earth become smaller?

Our earth has shrunk, the discovery of scientists from Bonn University (Germany) announced on 5-7. The scientific data of the project measuring the Earth's diameter showed that the diameter of our planet is now 5 mm smaller, 12,756,274 km compared to 5 years ago.

Dr. Axel Nothnagel, Head of the University of Bonn research group, said that this transformation is very small but plays a decisive role for positioning satellites capable of measuring sea level rise and fall. If the underground observatory tracks satellites that do not operate correctly to the millimeter, the satellite will not be able to provide accurate data.

In this two-year project, German scientists used a measurement system consisting of radio waves transmitted to space, with the ability to transmit to a network of more than 70 astronomical devices. Online routes all over the world. Since these stations are located far away from each other, the transmission time for radio signals is different. This has helped scientists calculate the distance between satellites with an accuracy of 2 mm / 1,000 km.

This process is called VLBI (Long Distance Boundary Interference Device), which has been used to detect Europe and North America moving away from each other at speeds of 18 mm / year.