NASA Astrobiology

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Emerging Trends in Comet Taxonomy. “Emerging trends and a comet taxonomy based on the volatile chemistry measured in thirty comets with high-resolution infrared spectroscopy between 1997 and 2013.” in Icarus

Cycles of Glaciation on Ancient Mars. “Climate Cycling on Early Mars Caused by the Carbonate-Silicate Cycle” in Earth and Planetary Astrophysics.

Methane Muted: How Did Early Earth Stay Warm?. “A proper accounting of biogeochemical cycles in the oceans reveals that methane has a much more powerful foe than oxygen.” in PNAS

Emerging Trends in Comet Taxonomy“Emerging trends and a comet taxonomy based on the volatile chemistry measured in thirty comets with high-resolution infrared spectroscopy between 1997 and 2013.” in Icarus01/03

Cycles of Glaciation on Ancient Mars“Climate Cycling on Early Mars Caused by the Carbonate-Silicate Cycle” in Earth and Planetary Astrophysics.02/03

Methane Muted: How Did Early Earth Stay Warm?“A proper accounting of biogeochemical cycles in the oceans reveals that methane has a much more powerful foe than oxygen.” in PNAS03/03

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December 2023A race against the clock: Constraining the timing of cometary bombardment relative to Earth’s growth

Joiret, S., Raymond, S. N., Avice, G., Clement, M. S., Deienno, R., & Nesvorný, D. (2023). A race against the clock: Constraining the timing of cometary bombardment relative to Earth’s growth. Icarus, 406, 115754. doi:10.1016/j.icarus.2023.115754

Radial distribution of distant trans-Neptunian objects points to Sun’s formation in a stellar cluster

Nesvorný, D., Bernardinelli, P., Vokrouhlický, D., & Batygin, K. (2023). Radial distribution of distant trans-Neptunian objects points to Sun’s formation in a stellar cluster. Icarus, 406, 115738. doi:10.1016/j.icarus.2023.115738

Ethene-ethanol ratios as potential indicators of hydrothermal activity at Enceladus, Europa, and other icy ocean worlds

Robinson, K. J., Hartnett, H. E., Gould, I. R., & Shock, E. L. (2023). Ethene-ethanol ratios as potential indicators of hydrothermal activity at Enceladus, Europa, and other icy ocean worlds. Icarus, 406, 115765. doi:10.1016/j.icarus.2023.115765

November 2023The important role of fluid chemistry in the hydrothermal alteration of ordinary chondrites: Insights from halite and sphalerite in the Sidi El Habib 001 (H5) meteorite

Che, S., Domanik, K. J., Chang, Y-J., & Zega, T. J. (2023). The important role of fluid chemistry in the hydrothermal alteration of ordinary chondrites: Insights from halite and sphalerite in the Sidi El Habib 001 (H5) meteorite. Earth and Planetary Science Letters, 621, 118374. doi:10.1016/j.epsl.2023.118374

October 2023The potassium isotopic composition of CI chondrites and the origin of isotopic variations among primitive planetary bodies

Koefoed, P., Barrat, J-A., Pravdivtseva, O., Alexander, C. M. O. D., Lodders, K., Ogliore, R., & Wang, K. (2023). The potassium isotopic composition of CI chondrites and the origin of isotopic variations among primitive planetary bodies. Geochimica et Cosmochimica Acta, 358, 49–60. doi:10.1016/j.gca.2023.07.025

The H content of aubrites: An evaluation of bulk versus in situ methods for quantifying water in meteorites

Peterson, L. D., Newcombe, M. E., Alexander, C. M. O. D., Wang, J., Klein, F., Bekaert, D. V., & Nielsen, S. G. (2023). The H content of aubrites: An evaluation of bulk versus in situ methods for quantifying water in meteorites. Earth and Planetary Science Letters, 620, 118341. doi:10.1016/j.epsl.2023.118341

Chronology of alkali anorthosite 14304 clast “b” records basin forming impact at ∼3.95 Ga

Kruijer, T. S., Borg, L. E., Cassata, W. S., Wimpenny, J., Brennecka, G. A., Shearer, C. K., & Simon, S. B. (2023). Chronology of alkali anorthosite 14304 clast “b” records basin forming impact at ∼3.95 Ga. Geochimica et Cosmochimica Acta, 358, 61–76. doi:10.1016/j.gca.2023.07.026

September 2023Reconciling biogeochemical redox proxies: Tracking variable bottom water oxygenation during OAE-2 using vanadium isotopes

Li, S., Friedrich, O., Nielsen, S. G., Wu, F., & Owens, J. D. (2023). Reconciling biogeochemical redox proxies: Tracking variable bottom water oxygenation during OAE-2 using vanadium isotopes. Earth and Planetary Science Letters, 617, 118237. doi:10.1016/j.epsl.2023.118237

Stable Brine Layers beneath Europa’s Chaos

Chivers, C. J., Buffo, J. J., & Schmidt, B. E. (2023). Stable Brine Layers beneath Europa’s Chaos. The Planetary Science Journal, 4(9), 159. doi:10.3847/psj/acea75

Canyon Diablo lonsdaleite is a nanocomposite containing c/h stacking disordered diamond and diaphite

Németh, P., Garvie, L. A. J., & Salzmann, C. G. (2023). Canyon Diablo lonsdaleite is a nanocomposite containing c/h stacking disordered diamond and diaphite. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 381(2259), None. doi:10.1098/rsta.2022.0344

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