Results 201 to 210 of about 245,593 (320)

Oldhamite: a new link in upper mantle for C-O-S-Ca cycles and an indicator for planetary habitability. [PDF]

open access: yesNatl Sci Rev, 2023
Liu Y   +9 more
europepmc   +1 more source

A Dust-Scattering Model for M1-92: A Revised Estimate of the Mass Distribution and Inclination

open access: yesGalaxies
Preplanetary nebulae (PPNe) are formed from mass-ejecting late-stage AGB stars. Much of the light from the star gets scattered or absorbed by dust particles, giving rise to the observed reflection nebula seen at visible and near-IR wavelengths ...
Yun Qi Li   +2 more
doaj   +1 more source

Optical Spectroscopy and Photoionization Model of Planetary Nebula NGC 6572

open access: yesJournal of Mathematical and Fundamental Sciences
We investigated NGC 6572 through optical spectroscopy to determine its kinematical and chemical properties. Two intermediate dispersion spectra (R~5000) centered around Hα and Hβ were used to derive the nebular expansion velocity from emission lines ...
Muhammad Fajrin   +2 more
doaj   +1 more source

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