News for hackers. Stuff that matters.

A comment on A meteorite hit the moon during yesterday's total lunar eclipse. Parent comment

Re:A meteorite hit the moon during yesterday's total lunar e... by dredmorbius on Tuesday January 22, 2019 @07:54PM (#18974612)
The expansion constant is weaker than gravity, such that gravitationally-bound structures, including everything from asteroids up through galactic clusters, will survive.

Beyond the local galactic cluster though -- quite possibly nothing.

[ Parent | on HN ]
Re:A meteorite hit the moon during yesterday's total lunar e... by ValleyOfTheMtns on Tuesday January 22, 2019 @08:33PM (#18974868)
> Beyond the local galactic cluster though -- quite possibly nothing.

Do you mean the Local Group?

https://en.wikipedia.org/wiki/Local_Group

Or the Local Supercluster?

https://en.wikipedia.org/wiki/Virgo_Supercluster

[ Parent | on HN ]
Re:A meteorite hit the moon during yesterday's total lunar e... by dwaltrip on Wednesday January 23, 2019 @01:56AM (#18976267)
The Local Group is gravitationally bound, but that isn't the case with the local supercluster. I believe that most (all?) superclusters are not gravitationally bound.

In fact, the entire local group will eventually be a single galaxy I believe, mostly composed of the contents of the Milky Way and Andromeda galaxies.

[ Parent | on HN ]