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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April 2020Defining Lyfe in the Universe: From Three Privileged Functions to Four Pillars

Bartlett, S., & Wong, M. L. (2020). Defining Lyfe in the Universe: From Three Privileged Functions to Four Pillars. Life, 10(4), 42. doi:10.3390/life10040042

Direct Synthesis of Amides from Amines and Carboxylic Acids under Hydrothermal Conditions

Fu, X., Liao, Y., Glein, C. R., Jamison, M., Hayes, K., Zaporski, J., & Yang, Z. (2020). Direct Synthesis of Amides from Amines and Carboxylic Acids under Hydrothermal Conditions. ACS Earth and Space Chemistry, 4(5), 722–729. doi:10.1021/acsearthspacechem.0c00009

Trace Element Concentrations in Hydrothermal Silica Deposits as a Potential Biosignature

Gangidine, A., Havig, J. R., Fike, D. A., Jones, C., Hamilton, T. L., & Czaja, A. D. (2020). Trace Element Concentrations in Hydrothermal Silica Deposits as a Potential Biosignature. Astrobiology, 20(4), 525–536. doi:10.1089/ast.2018.1994

The Radiation Stability of Thymine in Solid H2O

Materese, C. K., Gerakines, P. A., & Hudson, R. L. (2020). The Radiation Stability of Thymine in Solid H2O. Astrobiology. doi:10.1089/ast.2019.2199

Retrograde-rotating Exoplanets Experience Obliquity Excitations in an Eccentricity-enabled Resonance

Kreyche, S. M., Barnes, J. W., Quarles, B. L., Lissauer, J. J., Chambers, J. E., & Hedman, M. M. (2020). Retrograde-rotating Exoplanets Experience Obliquity Excitations in an Eccentricity-enabled Resonance. The Planetary Science Journal, 1(1), 8. doi:10.3847/psj/ab8198

Origin and age of metal veins in Canyon Diablo graphite nodules

Hilton, C. D., Ash, R. D., Piccoli, P. M., Kring, D. A., McCoy, T. J., & Walker, R. J. (2020). Origin and age of metal veins in Canyon Diablo graphite nodules. Meteoritics & Planetary Science. doi:10.1111/maps.13464

Diamond-graphene composite nanostructures

Németh, P., McColl, K., Smith, R. L., Murri, M., Garvie, L. A. J., Alvaro, M., … McMillan, P. F. (2020). Diamond-graphene composite nanostructures. Nano Letters. doi:10.1021/acs.nanolett.0c00556

New codons for efficient production of unnatural proteins in a semisynthetic organism

Fischer, E. C., Hashimoto, K., Zhang, Y., Feldman, A. W., Dien, V. T., Karadeema, R. J., … Romesberg, F. E. (2020). New codons for efficient production of unnatural proteins in a semisynthetic organism. Nature Chemical Biology. doi:10.1038/s41589-020-0507-z

Acid Experimental Evolution of the Haloarchaeon Halobacterium sp. NRC-1 Selects Mutations Affecting Arginine Transport and Catabolism

Kunka, K. S., Griffith, J. M., Holdener, C., Bischof, K. M., Li, H., DasSarma, P., … Slonczewski, J. L. (2020). Acid Experimental Evolution of the Haloarchaeon Halobacterium sp. NRC-1 Selects Mutations Affecting Arginine Transport and Catabolism. Frontiers in Microbiology, 11, None. doi:10.3389/fmicb.2020.00535

Infaunal augurs of the Cambrian explosion: An Ediacaran trace fossil assemblage from Nevada, USA

Tarhan, L. G., Myrow, P. M., Smith, E. F., Nelson, L. L., & Sadler, P. M. (2020). Infaunal augurs of the Cambrian explosion: An Ediacaran trace fossil assemblage from Nevada, USA. Geobiology. doi:10.1111/gbi.12387

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