Search found 2 matches

by southofblock
Thu Jul 19, 2012 1:57 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Simulation: A Disk Galaxy Forms (2012 Jul 17)
Replies: 37
Views: 8911

Re: APOD: Simulation: A Disk Galaxy Forms (2012 Jul 17)

Fine. What though causes the initial spin? That is, the center of mass of a clump of gas particles is vectored directly towards the center of mass of the larger, denser collection of particles. Where is the moment arm? The center of mass of a clump of gas particles isn't vectored towards the center...
by southofblock
Wed Jul 18, 2012 3:07 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Simulation: A Disk Galaxy Forms (2012 Jul 17)
Replies: 37
Views: 8911

Re: APOD: Simulation: A Disk Galaxy Forms (2012 Jul 17)

http://www.youtube.com/watch?v=AQLtcEAG9v0 Why does it start to spin and what keeps it spinning? Conservation of angular momentum Fine. What though causes the initial spin? That is, the center of mass of a clump of gas particles is vectored directly towards the center of mass of the larger, denser ...