If you really want to scare the shit out of yourself :

• Re-read carefully all the Beacon Sequences in OSABC
• Re-read the end of ATTWN, with Tetrimus
• Read the Hanar Figures of Note Chapter

Then go read chapter five of Fear Unrelenting.

The answers are out there.

https://www.newscientist.com/article/mg20327246.000-13-more-things-dark-flow

http://www.deepastronomy.com/hypernova-vy-canis-majoris.html