Too big to build on Earth? #shorts

It’s an observatory so big that it can’t be built on Earth…. It’s been 11 years since we detected the very first gravitational wave signal caused by two black holes merging 1.4 billion light years away, that detectors here on Earth managed to pick up on 14th September 2015. Since then we’ve detected almost 400 gravitational wave signals from merging black holes somewhere out there in the Universe. Now the European Space Agency are currently building LISA, the next generation of gravitational