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 2023Direct Simulation Monte Carlo Modeling of Ammonia in Comet C/2014 Q2 (Lovejoy)

Kawakita, H., Dello Russo, N., Vervack, R. J., DiSanti, M. A., Bonev, B. P., Kobayashi, H., … Shinnaka, Y. (2023). Direct Simulation Monte Carlo Modeling of Ammonia in Comet C/2014 Q2 (Lovejoy). The Astronomical Journal, 166(5), 207. doi:10.3847/1538-3881/acfee7

Nitrate Reactivity in Iron (Oxy)hydroxide Systems: Effect of pH, Iron Redox State, and Phosphate

Martinez, E., Rodriguez, L. E., Sheppard, R. Y., Zhang, Y., Cid, C. A., Khodayari, A., & Barge, L. M. (2023). Nitrate Reactivity in Iron (Oxy)hydroxide Systems: Effect of pH, Iron Redox State, and Phosphate. ACS Earth and Space Chemistry. doi:10.1021/acsearthspacechem.3c00218

Solid-State Single-Molecule Sensing with the Electronic Life-Detection Instrument for Enceladus/Europa (ELIE)

Carr, C. E., Ramírez-Colón, J. L., Duzdevich, D., Lee, S., Taniguchi, M., Ohshiro, T., … Zuber, M. T. (2023). Solid-State Single-Molecule Sensing with the Electronic Life-Detection Instrument for Enceladus/Europa (ELIE). Astrobiology, 23(10), 1056–1070. doi:10.1089/ast.2022.0119

Lipid Biosignatures From SO4-Rich Hypersaline Lakes of the Cariboo Plateau

Nichols, F., Pontefract, A., Dion-Kirschner, H., Masterson, A. L., Osburn, M. R. (2023). Lipid Biosignatures From SO4-Rich Hypersaline Lakes of the Cariboo Plateau. JGR Biogeosciences, 128, 10. doi: 10.1029/2023JG007480

The distribution of CO2 on Europa indicates an internal source of carbon

Trumbo, S. K., Brown, M. E. (2023). The distribution of CO2 on Europa indicates an internal source of carbon. Science, 381(6664), 1308-1311. doi: 10.1126/science.adg4155

Endogenous CO2 ice mixture on the surface of Europa and no detection of plume activity

Villanueva, G. L., Hammel, H. B., Milam, S. N., Kofman, V., Hand, K. P., Paganini, L., Stansberry, J., Liuzzi, G. (2023). Endogenous CO2 ice mixture on the surface of Europa and no detection of plume activity. Science, 381(6664), 1305-1308. doi: 10.1126/science.adg4270

September 2023Characterization of aqueous alteration and formation of salty exposures at Ius Chasma, Mars

Wilk, K., Bishop, J. L., Weitz, C. M., Parente, M., Saranathan, A. M., Itoh, Y., … Seelos, F. (2023). Characterization of aqueous alteration and formation of salty exposures at Ius Chasma, Mars. Icarus, None, 115800. doi:10.1016/j.icarus.2023.115800

A robust, agnostic molecular biosignature based on machine learning

Cleaves, H. J., Hystad, G., Prabhu, A., Wong, M. L., Cody, G. D., Economon, S., & Hazen, R. M. (2023). A robust, agnostic molecular biosignature based on machine learning. Proceedings of the National Academy of Sciences, 120(41), None. doi:10.1073/pnas.2307149120

Reconciling 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

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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