Stars frequently form in crowded environments. By combining the resources of multi-wavelength missions like Chandra in the X-ray and Spitzer in the infrared, astronomers are able to resolve ambiguities and assemble a much more complete census of cluster content and the individual properties of the population. A case in point is the development of disks (possibly protoplanetary) around new stars. Disks form along with the new star and then evolve over a few million years before dissipating, perhaps leaving planets behind, and in clustered environments their development can be influenced by interactions with neighbors.
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