From CGI member Paralemptor:

*****************************************

Very interesting!

I found some more information on Dr. Ana Bonaca. She's a Harvard-Smithsonian Center for Astrophysics researcher.

Para

APS Physics:
Dynamical evidence for a dark substructure in the Milky Way halo (Q04.00001)
Presented at APS April Meeting 2019 on April 15, 2019
Session Q04: New Astrophysical Probes of Dark Matter
Speaker: Dr. Ana Bonaca

https://absuploads.aps.org/presentation.cfm?pid=15143
You can download slides on this link ^^^

--

snip
The American Physical Society annual meeting has been presented with evidence of a ‘dark impactor’ — an invisible source of gravity — tearing holes in our galaxy’s tidal star formations.

Harvard-Smithsonian Center for Astrophysics researcher Dr Ana Bonaca was studying stellar streams, long lines of stars stretched out and flowing through our galaxy.

https://www.news.com.au/technology/science/space/hole-in-milky-way-may-point-to-dark-matter/news-story/fbb5fc0f05dbafc9e5d3efeae309ad1a

-
At a conference of the American Physical Society in Denver on April 15, Harvard-Smithsonian researcher Ana Bonaca presented data from the Gaia space observatory operated by the European Space Agency (ESA) that she said suggests “a dense bullet of something” invisible to our telescopes shot holes in the galaxy.
https://world.wng.org/content/genetic_controversies/#galaxy

--