[eclecticEel]

the astronomer has now measured the radial velocity of 12,000 stars in that region for the first time. In this way she found that 15 stars show a different velocity pattern than the others

Call me skeptical, but any large data set will have outliers. And what's with the image anyway? If there's only 15 discovered members in this steam of stars (if it exists at all) why do I see several hundred stars locations depicted?

[Bellflower]

Call me skeptical, but any large data set will have outliers. And what's with the image anyway? If there's only 15 discovered members in this steam of stars (if it exists at all) why do I see several hundred stars locations depicted?

Good points. Some of the data may be correct but they are so quick to decide what causes something unusual. They then talk about their conclusion as though it is fact and the only possible reason for the anomaly. We really know so little about the operations of universe that we do not have a right to draw quick conclusions and pronounce them as near facts/facts.