Within the next billion years, the Magellanic Clouds might merge with our galaxy. But the new stars are already here
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Remarkably, all of these factors line up, and this new star cluster really is a finding like nothing ever before.determining their properties, positions, and association in 3D space using data from ESA's Gaia mission. The scientists propose that these stars formed from material from two dwarf galaxies known as the Magellanic Clouds.
But there are good reasons to believe that these new stars did indeed form from the gas in the Magellanic Clouds, and yet now are closer to the Milky Way and on the opposite side from the clouds. Because we can see how both the Large and Small Magellanic Clouds are moving and where, in three-dimensional space, they're located today, we can reconstruct their past motions.... [+]
While the leading stream of this gas is much more diffuse and lower in mass overall than the gas found either in or behind the Magellanic Clouds, there are three observations that strongly indicate these new Milky Way stars come from this gas stream.... [+]A. M. Price-Whelan et al., ApJ 887:19 The location of the new star cluster PW 1 matches the physical location of this leading debris stream.to the Milky Way . The star cluster probably formed from material from the Large and Small Magellanic Clouds . The vertical green line shows the location of the Sun.The discovery of this new star cluster – which is comparable in mass, age, and star type to the Pleiades – marks the very first time after some 30 years of searches that stars exist somewhere in the Magellanic stream.
This means that the gas from the Magellanic Clouds – at least from the leading stream of the clouds – is headed into the Milky Way to replenish the amount of new material available for star formation much sooner than expected. These new stars from the stellar association PW 1 are bound to our Milky Way, and will remain a part of our galaxy for the entirety of their lifetimes.... [+]
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