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1. Credit: NASA

2. Credit: LIGO

3. Credit: R. Hurt/Caltech-JPL

4. Credit: LIGO

5. Credit: LIGO

6. Credit: R. Hurt/Caltech-JPL

7. Credit: NASA/J.I. Thorpe ,

8. Credit: NanoGrav, University of Maryland, NSF

9. Credit: NanoGrav, NSF

10. Credit: NanoGrav, Elizabeth Ferrara (. & )

12. Credit: Sarah Spolaor ) ( 3 )

13. Credit: NASA/J.I. Thorpe ,

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