Globular cluster Definition and 11 Threads

I attached a file which shows my attempt to resolve this problem with the possible two pair interaction which gives us the kinetic energy of the cluster in an expanding system, at least I think so. But to be honest I´m more or less completely stuck with this question and I would be glad if...

by Ken Croswell Call it the case of the purloined star cluster. Observations reveal that our galaxy stole a distant globular star cluster from one of its neighbours. Link: New Scientist

Virgo has moved on, Hercules is now in position- from last night: This is a downsized crop. Technical deets: 800/5.6, 10s ISO 2000, 204 frames.

So I was interested in how astronomers measure the distances to other stars, galaxies, etc and I found this pdf about the subject http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1992PASP..104..599J&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf It seems to be a good...

Dr. Tom Maccarone is a coauthor of the paper, “Two stellar-mass black holes in the globular cluster M22”, and is Associate Professor,Department of Physics, at Texas Tech University at Lubbock Texas. The work is discussed in a popular form at "Physicists Find Black Holes In Globular Star...

In preparing a post for the globular cluster thread, I found reference to "High Velocity Globular Cluster One, or HVGC-1. This is the first globular cluster discovered to have been ejected by the interaction of two massive black holes. http://hvgc-1/ A Globular Cluster Toward M87 with a Radial...

Hi, Could someone enlighten me in this matter? . how the calibration of cosmic distance scale affects the determination of the age of globular star clusters? thanks a lot :)

what's the center of a globular cluster , is it a star or can it be a black hole ? how are they formed and bound to gravitational pull of the milky way

I just recently got a dobsonian reflector telescope, (Orion SkyQuest XT8 PLUS Dobsonian Reflector Telescope) and I was wondering what the best way to see the andromeda galaxy would be using the telescope? Of these, which would be the best eye piece for that sort of thing?: Orion 2" 28mm...

: Estimate the mass of a globular cluster with the radius of R=20pc and root mean square velocity of stars equal to Vrms=3km/s i can apply the formula like Vrms=(root over) 3RT/M ( where R=gas constant, T= absolute temperature, M=mass of the cluster) but here the variable of the "T" is...

Would it be possible to calculate the approximate distance between stars in a globular cluster by doing something simple like this: Approximate distance to a cluster: 25,000 Ly Two stars in the cluster just barely resolved in my telescope (resolution about 1 arcsec) Therefore: 2pi...