In order to use LIGO for astronomy, you need to know the location of the source of the gravitational waves. Here's how that works. The post LIGO Ain't a Gravitational Wave Detector—It's an Observatory appeared first on WIRED.
In the recent LIGO announcement, it was claimed the event was two colliding black holes 1.3 billion years ago. How do we know this?
The post Using Gravitational Waves to Pinpoint Colliding Black Holes appeared first on WIRED.