نتایج جستجو برای: curtis procedure

تعداد نتایج: 618149  

Journal: :Journal of Mathematical Analysis and Applications 1993

Journal: :Archiv für Mikroskopische Anatomie 1912

Journal: :Journal of Case Reports and Images in Obstetrics and Gynecology 2018

Journal: :Queensland Archaeological Research 1999

2000
Lawrence H. Aller

A historical perspective on the study of asymmetries in planetary nebulae (PNs) is presented. We also describe our ongoing work in high resolution spectroscopy of planetaries, and discuss some likely future directions for the study of asymmetrical PNs. The first systematic study of planetary nebulae (PNs) was undertaken at Lick Observatory from 1914 to 1917 and is reported in detail in Volume 1...

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