Tuesday, June 22, 2010

NGC 3603 Interesting cluster

Credit: NASA, ESA and Wolfgang Brandner (MPIA), Boyke Rochau (MPIA) and Andrea Stolte (University of Cologne)"The cluster, formally known as the NGC 3603 Young Cluster, is about 20 000 light-years from the Sun which makes these measurements extraordinarily difficult."
This is 17 light-years across. This picture cast severe doubts on Newtonian mechanics and Kepler orbits. I need to think more about that distance and number of stars in the cluster.
Another great paper on NGC 3603
Galactic Starburst NGC 3603 from XRay to Radio

A. F. J. Moffat ,1 M. F. Corcoran ,2,3 I. R. Stevens ,4 G. Skalkowski ,1 S. V. Marchenko ,1,5 A. Mücke ,1,6 A. Ptak ,7B. S. Koribalski ,8 L. Brenneman ,3 R. Mushotzky ,3 J. M. Pittard ,9 A. M. T. Pollock ,10 and W. Brandner 11
The Astrophysical Journal, 573:191-198, 2002 July 1
© 2002. The American Astronomical Society. All rights reserved. Printed in U.S.A.
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This picture was taken on 

2007 October 5 

There is a Zoomable picture from ESO at 

Credit ESO
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