Results 121 to 130 of about 53,151 (238)
The Parallax of the Planetary Nebulae N. G. C. 7662 [PDF]
, 1917 A. van Maanen
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Dust in planetary nebulae [PDF]
Proceedings of the International Astronomical Union, 2016 AbstractInfrared spectra from the Spitzer Space Telescope trace the evolution of carbon-rich dust from the asymptotic giant branch (AGB) to young planetary nebulae (PNe). On the AGB, amorphous carbon dominates the dust, but SiC and MgS also appear. In more evolved systems with warmer central stars, the spectra reveal the unidentified 21 μm feature ...
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Electron Temperatures and Electron Densities in Planetary Nebulae [PDF]
, 1954 M. J. Seaton
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Nuclei of Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1973 In 1969 Aller and I collected information about the spectra of emission-line nuclei of planetary nebulae. (See also Aller, 1967, for classification of both emission and absorption spectra.) We classified them and compared them to the spectra of Population I stars. Our idea was to follow this general classification by detailed observation and comparison
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2020 Nier Prize to Thomas Kruijer
Meteoritics &Planetary Science, Volume 60, Issue 5, Page E9-E10, May 2025.
Thorsten Kleine
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The mystery of unidentified infrared emission bands. [PDF]
Astrophys Space Sci, 2022 Kwok S.
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Planetary Nebulae Shaped by Common Envelope Evolution
Galaxies, 2018 The morphologies of planetary nebula have long been believed to be due to wind shaping processes in which a “fast wind„ from the central star impacts a previously ejected envelope.
Adam Frank +5 more
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Planetary Nebulae: An Introductory Review [PDF]
Symposium - International Astronomical Union, 1983 Planetary nebulae constitute a popular field of investigation because they offer a unique opportunity to study the final stages of stellar evolution before a star dies. They supply challenges not only to the stellar evolution expert but also to the spectroscopist, to the student of galactic structure, and to all observers, whether one works in the ...
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Open questions on carbon-based molecules in space. [PDF]
Commun Chem, 2022 Hansen CS +3 more
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