... The galaxy is named after Arthur Allen Hoag who discovered it in 1950 and identified it as either a planetarynebula or a peculiar galaxy[2] with eight billion stars. ...
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Ссылки http://www.astro.louisville.edu/shared_skies/archive/select/unusual/hoags_object/20130412/hoags_object_wikipedia_20130422.pdf -- 498.8 Кб -- 22.04.2013 Похожие документы
... Hubble shows that the interior of the nebula "changes its stripes" every few days, according to Jeff Hester of Arizona State University in Tempe, AZ, who leads the team of astronomers that took the Wide Field and Planetary Camera 2 (WFPC2) images ...
... Planetary nebulae are also ideal targets for spectroscopic study since the relative strength of lines is a diagnostic of the density and temperature in the nebula, and Doppler shifts due to gas motions may be distinguished. ...
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Ссылки http://www.astro.louisville.edu/shared_skies/documents/shared_skies_student_projects.pdf -- 81.7 Кб -- 17.10.2011 Похожие документы