Introduction

Some history and observations

1. Development of theory of gravitational radiation

2. Evolution of the experimental side

3. What was observed?

Are observations consistent with TGD predictions?

1. Some TGD background for LIGO observations

2. A gamma ray pulse was detected .4 seconds after the merger

3. Does GW150914 force to modify the views about formation of binary blackhole systems?

4. Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted

5. Third gravitational wave detection by LIGO collaboration

6. Some comments about GW170817

7. LIGO: no evidence for cosmic strings

8. LIGO challenges the views about formation of neutron stars and their collisions

Appendix: Some details about rotating and charged blackholes