1. The Laser Interferometer Gravitational-Wave Observatory (LIGO). http://www.ligo.org . Accessed 23 Feb 2017
2. The Event Horizon Telescope (EHT). http://www.eventhorizontelescope.org . Accessed 23 Feb 2017
3. The Advanced Telescope for High ENergy Astrophysics (ATHENA). http://www.the-athena-x-ray-observatory.eu . Accessed 23 Feb 2017
4. The Square Kilometre Array (SKA). http://www.skatelescope.org . Accessed 23 Feb 2017
5. The Evolved Laser Interferometer Space Antenna (eLISA). http://www.elisascience.org . Accessed 23 Feb 2017