| http://www.w3.org/ns/prov#value | - ess of the dust, associated with temperature variations in the nebula, may also play a part.Located some 500 light years from Earth, IRC+10216 is one of the best-known examples of the 150 or so evolved stars which are being studied in the MESS survey, one of the guaranteed time, key observational programmes being undertaken with the PACS and SPIRE instruments on board Herschel.The angular resolu
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