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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March 2020Wide but not ubiquitous distribution of glendonite in the Doushantuo Formation, South China: Implications for Ediacaran climate

Wang, Z., Chen, C., Wang, J., Suess, E., Chen, X., Ma, X., … Xiao, S. (2020). Wide but not ubiquitous distribution of glendonite in the Doushantuo Formation, South China: Implications for Ediacaran climate. Precambrian Research, 338, 105586. doi:10.1016/j.precamres.2019.105586

February 2020Internal Structure and CO2 Reservoirs of Habitable Water Worlds

Marounina, N., & Rogers, L. A. (2020). Internal Structure and CO2 Reservoirs of Habitable Water Worlds. The Astrophysical Journal, 890(2), 107. doi:10.3847/1538-4357/ab68e4

Nitrogen isotope ratios trace high-pH conditions in a terrestrial Mars analog site

Stüeken, E. E., Tino, C., Arp, G., Jung, D., & Lyons, T. W. (2020). Nitrogen isotope ratios trace high-pH conditions in a terrestrial Mars analog site. Science Advances, 6(9), eaay3440. doi:10.1126/sciadv.aay3440

The evolving redox chemistry and bioavailability of vanadium in deep time

Moore, E. K., Hao, J., Spielman, S. J., & Yee, N. (2020). The evolving redox chemistry and bioavailability of vanadium in deep time. Geobiology, 18(2), 127–138. doi:10.1111/gbi.12375

Uranium 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

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