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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May 2018Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1

Jontof-Hutter, D., Truong, V. H., Ford, E. B., Robertson, P., & Terrien, R. C. (2018). Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1. The Astronomical Journal, 155(6), 239. doi:10.3847/1538-3881/aabee8

Strategies for Detecting Biological Molecules on Titan

Neish, C. D., Lorenz, R. D., Turtle, E. P., Barnes, J. W., Trainer, M. G., Stiles, B., … Malaska, M. J. (2018). Strategies for Detecting Biological Molecules on Titan. Astrobiology, 18(5), 571–585. doi:10.1089/ast.2017.1758

Assessment of Density Functional Methods for Geometry Optimization of Bimolecular van der Waals Complexes

Sirianni, D. A., Alenaizan, A., Cheney, D. L., & David Sherrill, C. (2018). Assessment of Density Functional Methods for Geometry Optimization of Bimolecular van der Waals Complexes. Journal of Chemical Theory and Computation. doi:10.1021/acs.jctc.8b00114

Synthesis of β-Peptide Standards for Use in Model Prebiotic Reactions

Forsythe, J. G., English, S. L., Simoneaux, R. E., & Weber, A. L. (2018). Synthesis of β-Peptide Standards for Use in Model Prebiotic Reactions. Origins of Life and Evolution of Biospheres. doi:10.1007/s11084-018-9558-5

C-4 sterol demethylation enzymes distinguish bacterial and eukaryotic sterol synthesis

Lee, A. K., Banta, A. B., Wei, J. H., Kiemle, D. J., Feng, J., Giner, J-L., & Welander, P. V. (2018). C-4 sterol demethylation enzymes distinguish bacterial and eukaryotic sterol synthesis. Proceedings of the National Academy of Sciences, None, 201802930. doi:10.1073/pnas.1802930115

VUV pressure-broadening in sulfur dioxide

Lyons, J. R., Herde, H., Stark, G., Blackie, D. S., Pickering, J. C., & De Oliveira, N. (2018). VUV pressure-broadening in sulfur dioxide. Journal of Quantitative Spectroscopy and Radiative Transfer, 210, 156–164. doi:10.1016/j.jqsrt.2018.02.013

Linearized Flux Evolution (LiFE): A technique for rapidly adapting fluxes from full-physics radiative transfer models

Robinson, T. D., & Crisp, D. (2018). Linearized Flux Evolution (LiFE): A technique for rapidly adapting fluxes from full-physics radiative transfer models. Journal of Quantitative Spectroscopy and Radiative Transfer, 211, 78–95. doi:10.1016/j.jqsrt.2018.03.002

Atmospheric Seasonality as an Exoplanet Biosignature

Olson, S. L., Schwieterman, E. W., Reinhard, C. T., Ridgwell, A., Kane, S. R., Meadows, V. S., & Lyons, T. W. (2018). Atmospheric Seasonality as an Exoplanet Biosignature. The Astrophysical Journal, 858(2), L14. doi:10.3847/2041-8213/aac171

Caveats to Exogenous Organic Delivery from Ablation, Dilution, and Thermal Degradation

Mehta, C., Perez, A., Thompson, G., & Pasek, M. (2018). Caveats to Exogenous Organic Delivery from Ablation, Dilution, and Thermal Degradation. Life, 8(2), 13. doi:10.3390/life8020013

Linking the rise of atmospheric oxygen to growth in the continental phosphorus inventory

Cox, G. M., Lyons, T. W., Mitchell, R. N., Hasterok, D., & Gard, M. (2018). Linking the rise of atmospheric oxygen to growth in the continental phosphorus inventory. Earth and Planetary Science Letters, 489, 28–36. doi:10.1016/j.epsl.2018.02.016

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