Trapeshopen er en åpen stjernehop med stjerner i hjertet av Oriontåken, i stjernebildet Orion. Stjernehopen ble oppdaget av Galileo Galilei. 4. februar 1617 skisserte han tre av stjernene (A, C, D), men ikke den omgivende tåken.Galileo Galilei: Siderius Nuncius, Venice, 1610. English Translation published at Bard College, Hudson NY" October 9, 2003 English Translation Original Latin version Tom Pope and Jim Mosher: Galilean telescope homepage" March 17, 2006 , «Some have expressed puzzlement that in his text Galileo does not mention the nebulosity (known in modern nomenclature as M42) enveloping these stars. ... Galileo believed, as he explains in Sidereus Nuncius, that what looks nebulous to the eye is resolved into stars by his telescope; what looks nebulous through his telescope could presumably also be resolved into stars by a still larger and more powerful telescope. Hence, a diffuse glow would be, more than anything, an indication of the limitations of his telescope and not particularly worthy of special note.»Tom Pope and Jim Mosher: Page on Galileo's February 4, 1617 notebook drawing of the Trapezium region, May 2, 2006 "Perhaps significantly, Galileo makes no mention of having noticed the now well-known gas cloud, M42, surrounding the Trapezium stars."
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Chandra Observatory Uncovers Hot Stars In The Making, MIT Press Release, 2000. A detailed description of the Trapezium Cluster Observing the Trapzium
Kategori:Åpne stjernehoper Kategori:Orion (stjernebilde) Kategori:Artikler i astronomiprosjektet