28m 00s
KAGRA - Heralding a New Era in Astronomy!
Science View
28m 00s

Broadcast on April 1, 2020
Available until April 1, 2021

Predicted by Albert Einstein about 100 years ago, gravitational waves are ripples in space-time caused by the movement of a celestial body with huge mass. The ripples disrupt space-time and create waves that travel at the speed of light. On February 25, 2020, Japan's first gravitational wave detector KAGRA began full-scale operation. Detectors like KAGRA enable conventional telescopes that observe visible, infrared and electromagnetic waves to be used much more effectively, and they are bringing about a new era in astronomy. An NHK film crew had a chance to take a special tour of KAGRA before operation began, and in this episode, we'll take a sneak peek at its sapphire mirrors and other high-tech equipment that give it the world's best performance.