NASA Astrobiology

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A volcanically active planet is shown in closeup at the left side of the image with glowing eruptions and lines of lava on the surface. To the right and in the distance is a faint blue glowing ball representing the more massive planet in the system.

Sixteen frames from Voyager 1's flyby of Jupiter in 1979 were merged to create this image. Jupiter's Great Red Spot is visible in the center. Jupiter's moon Europa can be seen in the foreground at the bottom left of the image.

The frame is a horizontal rainbow of color on a grid. Shadows of molecules can be seen through the light as well as the jagged peaks and troughs of spectral lines.

Fizzy Super Earths and Lava Worlds“Fizzy Super-Earths: Impacts of Magma Composition on the Bulk Density and Structure of Lava Worlds.” in The Astrophysical Journal.01/03

Identifying Hydrothermal Activity on Icy Ocean Worlds“Ethene-ethanol ratios as potential indicators of hydrothermal activity at Enceladus, Europa, and other icy ocean worlds.” In Icarus.02/03

NASA Raman Spectroscopic Database"The NASA Raman spectroscopic database: Ramdb version 1.00.” In Icarus.03/03

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February 2020Uranium Isotope Fractionation (238U/235U) during U(VI) Uptake by Freshwater Plankton

Chen, X., Zheng, W., & Anbar, A. D. (2020). Uranium Isotope Fractionation (238U/235U) during U(VI) Uptake by Freshwater Plankton. Environmental Science & Technology. doi:10.1021/acs.est.9b06421

Constraining oceanic oxygenation during the Shuram excursion in South China using thallium isotopes

Fan, H., Nielsen, S. G., Owens, J. D., Auro, M., Shu, Y., Hardisty, D. S., … Wen, H. (2020). Constraining oceanic oxygenation during the Shuram excursion in South China using thallium isotopes. Geobiology. doi:10.1111/gbi.12379

Metabolic potentials of archaeal lineages resolved from metagenomes of deep Costa Rica sediments

Farag, I. F., Biddle, J. F., Zhao, R., Martino, A. J., House, C. H., & León-Zayas, R. I. (2020). Metabolic potentials of archaeal lineages resolved from metagenomes of deep Costa Rica sediments. The ISME Journal. doi:10.1038/s41396-020-0615-5

Reconstructing the evolutionary history of nitrogenases: Evidence for ancestral molybdenum‐cofactor utilization

Garcia, A. K., McShea, H., Kolaczkowski, B., & Kaçar, B. (2020). Reconstructing the evolutionary history of nitrogenases: Evidence for ancestral molybdenum‐cofactor utilization. Geobiology. doi:10.1111/gbi.12381

The Effect of Cosmic Rays on Cometary Nuclei. I. Dose Deposition

Gronoff, G., Maggiolo, R., Cessateur, G., Moore, W. B., Airapetian, V., De Keyser, J., … Hosseini, S. (2020). The Effect of Cosmic Rays on Cometary Nuclei. I. Dose Deposition. The Astrophysical Journal, 890(1), 89. doi:10.3847/1538-4357/ab67b9

Using Cathodic Poised Potential Experiments to Investigate Extracellular Electron Transport in the Crustal Deep Biosphere of North Pond, Mid-Atlantic Ridge

Jones, R. M., D’Angelo, T., & Orcutt, B. N. (2020). Using Cathodic Poised Potential Experiments to Investigate Extracellular Electron Transport in the Crustal Deep Biosphere of North Pond, Mid-Atlantic Ridge. Frontiers in Environmental Science, 8, None. doi:10.3389/fenvs.2020.00011

A compositionally heterogeneous martian mantle due to late accretion

Marchi, S., Walker, R. J., & Canup, R. M. (2020). A compositionally heterogeneous martian mantle due to late accretion. Science Advances, 6(7), eaay2338. doi:10.1126/sciadv.aay2338

Extraterrestrial, shock-formed, cage-like nanostructured carbonaceous materials

Németh, P., & Garvie, L. A. J. (2020). Extraterrestrial, shock-formed, cage-like nanostructured carbonaceous materials. American Mineralogist, 105(2), 276–281. doi:10.2138/am-2020-7305

Hints on the origins of particle traps in protoplanetary disks given by the M_dust-M_* relation

Pinilla, P., Pascucci, I., & Marino, S. (2020). Hints on the origins of particle traps in protoplanetary disks given by the M_dust-M_* relation. Astronomy & Astrophysics. doi:10.1051/0004-6361/201937003

Dark biological superoxide production as a significant flux and sink of marine dissolved oxygen

Sutherland, K. M., Wankel, S. D., & Hansel, C. M. (2020). Dark biological superoxide production as a significant flux and sink of marine dissolved oxygen. Proceedings of the National Academy of Sciences, 117(7), 3433–3439. doi:10.1073/pnas.1912313117

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