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 2019The fate of nitrogen during core-mantle separation on Earth

Grewal, D. S., Dasgupta, R., Holmes, A. K., Costin, G., Li, Y., & Tsuno, K. (2019). The fate of nitrogen during core-mantle separation on Earth. Geochimica et Cosmochimica Acta, 251, 87–115. doi:10.1016/j.gca.2019.02.009

Atmospheric mass-loss from high-velocity giant impacts

Yalinewich, A., & Schlichting, H. (2019). Atmospheric mass-loss from high-velocity giant impacts. Monthly Notices of the Royal Astronomical Society, 486(2), 2780–2789. doi:10.1093/mnras/stz1049

March 2019Bayesian Estimation of Earth’s Undiscovered Mineralogical Diversity Using Noninformative Priors

Hystad, G., Eleish, A., Hazen, R. M., Morrison, S. M., & Downs, R. T. (2019). Bayesian Estimation of Earth’s Undiscovered Mineralogical Diversity Using Noninformative Priors. Mathematical Geosciences, 51(4), 401–417. doi:10.1007/s11004-019-09795-8

Wide diversity of methane and short-chain alkane metabolisms in uncultured archaea

Borrel, G., Adam, P. S., McKay, L. J., Chen, L-X., Sierra-GarcíA, I. N., Sieber, C. M. K., … Gribaldo, S. (2019). Wide diversity of methane and short-chain alkane metabolisms in uncultured archaea. Nature Microbiology, 4(4), 603–613. doi:10.1038/s41564-019-0363-3

Surficial weathering of kaolin regolith in a subtropical climate: Implications for supergene pedogenesis and bedrock argillization

Fang, Q., Hong, H., Furnes, H., Chorover, J., Luo, Q., Zhao, L., & Algeo, T. J. (2019). Surficial weathering of kaolin regolith in a subtropical climate: Implications for supergene pedogenesis and bedrock argillization. Geoderma, 337, 225–237. doi:10.1016/j.geoderma.2018.09.020

Shortsighted Evolution Constrains the Efficacy of Long-Term Bet Hedging

Libby, E., & Ratcliff, W. C. (2019). Shortsighted Evolution Constrains the Efficacy of Long-Term Bet Hedging. The American Naturalist, 193(3), 409–423. doi:10.1086/701786

Co-occurring genomic capacity for anaerobic methane and dissimilatory sulfur metabolisms discovered in the Korarchaeota

McKay, L. J., Dlakić, M., Fields, M. W., Delmont, T. O., Eren, A. M., Jay, Z. J., … Inskeep, W. P. (2019). Co-occurring genomic capacity for anaerobic methane and dissimilatory sulfur metabolisms discovered in the Korarchaeota. Nature Microbiology, 4(4), 614–622. doi:10.1038/s41564-019-0362-4

Caves in space

Mylroie, J. (2019). Caves in space. Journal of Cave and Karst Studies, 81(1), 25–32. doi:10.4311/2018es0102

Earthshine as an illumination source at the Moon

Glenar, D. A., Stubbs, T. J., Schwieterman, E. W., Robinson, T. D., & Livengood, T. A. (2019). Earthshine as an illumination source at the Moon. Icarus, 321, 841–856. doi:10.1016/j.icarus.2018.12.025

Unusually variable paleocommunity composition in the oldest metazoan fossil assemblages

Finnegan, S., Gehling, J. G., & Droser, M. L. (2019). Unusually variable paleocommunity composition in the oldest metazoan fossil assemblages. Paleobiology, None, 1–11. doi:10.1017/pab.2019.1

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