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These generally represent those of the bulk solar nebula within which the planets formed, and provide the reference for consideration of terrestrial noble gases. Chondritic meteorites are rich in noble gases, and have long been considered as sources for terrestrial noble gases. While meteoritic gases...
For example, the rock cores of the planets likely did not “settle” from an initially well-mixed planet, but instead the gaseous components likely collapsed onto a preexisting rocky nucleus that formed in the protosolar nebula. Since the EOS of all possible mixtures has not been studied, ...
We note that alternative explanations invoking mass loss during rare evolutionary phases of stars (such as a proto-planetary nebula around an emerging white dwarf or a debris envelope around a merged blue straggler), have a much lower probability of occur- ance than our scenario. They share the...
to estimate the expansion velocities of the nebular envelopes and in the present work we present preliminary results of the kinematic analysis of these objects from several nebular lines of different ionization degrees in order to map the kinematics along the ionization structure of the nebula. We...
The messy death of a multiple star system and the resulting planetary nebula as observed by JWST Orsola De Marco Muhammad Akashi Albert A. Zijlstra Nature Astronomy(2022) A plague of magnetic spots among the hot stars of globular clusters ...
I used to live in Lanoka Harbor back in the late 80's to early 90's. Believe it or not, Lanoka Harbor was once a dark site. Back when I lived there you could easily see the Veil nebula. I had my best observing while living there. ...
Astronomers have carried out a study of almost 300 hundred planetary nebulae in the supergiant elliptical galaxy Messier 87. The new research, published September 27 on the arXiv pre-print repository, reveals essential information about the galaxy's oute
One striking example is NASA’s imaging of the famous “Pillars of Creation” in the Eagle Nebula. When viewed in different wavelengths, like infrared (in this image), these cosmic structures reveal details invisible to the naked eye or traditional telescopes. Hyperspectral imaging is good for ...
Therefore, when small planetary embryos (the proto-impactor) were formed in a sulfur-rich early Solar nebula and differentiated into core and mantle under highly reduced environment similar to the Mercury (mean IW-5.4)58, the mantle would be sulfur-rich and have a light Ni isotopic composition...