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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October 202016S rRNA Gene Diversity in Ancient Gray and Pink Salt from San Simón Salt Mines in Tarija, Bolivia

Pecher, W. T., Martínez, F. L., DasSarma, P., Guzmán, D., & DasSarma, S. (2020). 16S rRNA Gene Diversity in Ancient Gray and Pink Salt from San Simón Salt Mines in Tarija, Bolivia. Microbiology Resource Announcements, 9(41), None. doi:10.1128/mra.00820-20

Microsensors in Icy Environments to Detect Microbial Activities

McGlennen, M., Neubauer, M., Driesler, M., Dieser, M., Foreman, C. M., & Warnat, S. (2020). Microsensors in Icy Environments to Detect Microbial Activities. Journal of Microelectromechanical Systems, 29(5), 853–859. doi:10.1109/jmems.2020.3012420

Subsurface In Situ Detection of Microbes and Diverse Organic Matter Hotspots in the Greenland Ice Sheet

Malaska, M. J., Bhartia, R., Manatt, K. S., Priscu, J. C., Abbey, W. J., Mellerowicz, B., … d'Andrilli, J. (2020). Subsurface In Situ Detection of Microbes and Diverse Organic Matter Hotspots in the Greenland Ice Sheet. Astrobiology, 20(10), 1185–1211. doi:10.1089/ast.2020.2241

Abundant Atmospheric Methane from Volcanism on Terrestrial Planets Is Unlikely and Strengthens the Case for Methane as a Biosignature

Wogan, N., Krissansen-Totton, J., & Catling, D. C. (2020). Abundant Atmospheric Methane from Volcanism on Terrestrial Planets Is Unlikely and Strengthens the Case for Methane as a Biosignature. The Planetary Science Journal, 1(3), 58. doi:10.3847/psj/abb99e

Methanosarcina acetivorans contains a functional ISC system for iron-sulfur cluster biogenesis

Deere, T. M., Prakash, D., Lessner, F. H., Duin, E. C., & Lessner, D. J. (2020). Methanosarcina acetivorans contains a functional ISC system for iron-sulfur cluster biogenesis. BMC Microbiology, 20(1), None. doi:10.1186/s12866-020-02014-z

Kinetics and Mechanisms of Hydrothermal Ketonic Decarboxylation

Johnson-Finn, K. N., Gould, I. R., Williams, L. B., Hartnett, H. E., & Shock, E. L. (2020). Kinetics and Mechanisms of Hydrothermal Ketonic Decarboxylation. ACS Earth and Space Chemistry. doi:10.1021/acsearthspacechem.0c00189

Oxygen isotopic heterogeneity in the early Solar System inherited from the protosolar molecular cloud

Krot, A. N., Nagashima, K., Lyons, J. R., Lee, J-E., & Bizzarro, M. (2020). Oxygen isotopic heterogeneity in the early Solar System inherited from the protosolar molecular cloud. Science Advances, 6(42), eaay2724. doi:10.1126/sciadv.aay2724

A plausible metal-free ancestral analogue of the Krebs cycle composed entirely of α-ketoacids

Stubbs, R. T., Yadav, M., Krishnamurthy, R., & Springsteen, G. (2020). A plausible metal-free ancestral analogue of the Krebs cycle composed entirely of α-ketoacids. Nature Chemistry, 12(11), 1016–1022. doi:10.1038/s41557-020-00560-7

Spectroscopic Insights into Ferromanganese Crust Formation and Diagenesis

Sutherland, K. M., Wankel, S. D., Hein, J. R., & Hansel, C. M. (2020). Spectroscopic Insights into Ferromanganese Crust Formation and Diagenesis. Geochemistry, Geophysics, Geosystems. doi:10.1029/2020gc009074

Europium as a lodestar: diagnosis of radiogenic heat production in terrestrial exoplanets: Spectroscopic determination of Eu abundances in alpha Centauri AB

Wang, H. S., , T., Morel, Quanz, S. P., & Mojzsis, S. J. (2020). Europium as a lodestar: diagnosis of radiogenic heat production in terrestrial exoplanets: Spectroscopic determination of Eu abundances in alpha Centauri AB. Astronomy & Astrophysics. doi:10.1051/0004-6361/202038386

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