The Einstein Telescope is a proposed underground infrastructure to host a third-generation, gravitational-wave observatory
Albert Einstein predicted gravitational waves in 1916 on the basis of his general theory of relativity as ripples in spacetime. The telescope is expected to capture the waves and observe a volume of the universe much larger than is seen by the tools currently used, known as interferometers.
The new telescope will build on current laser-interferometric detectors such as Advanced Virgo and Advanced LIGO, whose breakthrough discoveries of merging black holes and neutron stars over the past five years have ushered scientists into the new era of gravitational-wave astronomy.
It will achieve a greatly improved sensitivity by increasing the size of the interferometer from the 3km arm length of the Virgo detector to 10km, and by implementing a series of new technologies. These include a cryogenic system to cool some of the main optics and...