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Results for “nebulae”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 1,081 records · Page 60

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NASA NTRS1994

Planetary Nebulae-ISM Interaction (Theory)

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planetary nebulae interstellar medium interaction ↗

NASA NTRS1999

The Etched Hourglass Nebula MyCn18: I. Hubble Space Telescope

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planetary nebulae stars MyCn18 AGB post-AGB mass-l↗

NASA NTRS2017

Refractory Organics in Comet 67P Churyumov-Gerasimenko: Additional Evidence for Large-scale Mixing in the Primitive Solar Nebula?

The COSIMA instrument onboard the Rosetta spacecraft collected and analyzed samples of individual particles from the coma of Comet67P/ Churyumov-Gerasimenko. Initial results of the analysis of several particles have been presented elsewhere while analyses of the organic component of the dust particles has been shown to compare favor ably to laboratory spectra of IOM extracted from the Orguil and Murchison meteorites. Here we will compare the spectra of the same two particles to laboratory spectra of organic grain coatings produced via Surface Mediated Reactions of CO, H2 and N2 on amorphous iron silicate grains.

Refractory Organics↗

NASA NTRS2001

Extinction with 2MASS: star counts and reddening toward the North America and the Pelican Nebulae

UNKNOWN

2MASS↗

NASA NTRS1998

Investigating the Near-Infrared Properties of Planetary Nebulae II. Medium Resolution Spectra

H2 was detected in four PNe in this survey for the first time. An analysis was perfomed using the H2 line ratios in all of the PN spectra in the survey where a sufficient number of lines were observed to determine the ortho-to-para ratio and the rotational and vibrational excitation temperatures of the H2 in those objects.

planetary↗

NASA NTRS1997