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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March 20211I/‘Oumuamua as an N 2 ice fragment of an exo‐Pluto surface: I. Size and Compositional Constraints

Jackson, A. P., & Desch, S. J. (2021). 1I/‘Oumuamua as an N 2 ice fragment of an exo‐Pluto surface: I. Size and Compositional Constraints. Journal of Geophysical Research: Planets. doi:10.1029/2020je006706

Tracing a modern biosphere on Mars

Cabrol, N. A. (2021). Tracing a modern biosphere on Mars. Nature Astronomy, 5(3), 210–212. doi:10.1038/s41550-021-01327-x

Enzyme-Specific Coupling of Oxygen and Nitrogen Isotope Fractionation of the Nap and Nar Nitrate Reductases

Asamoto, C. K., Rempfert, K. R., Luu, V. H., Younkin, A. D., & Kopf, S. H. (2021). Enzyme-Specific Coupling of Oxygen and Nitrogen Isotope Fractionation of the Nap and Nar Nitrate Reductases. Environmental Science & Technology. doi:10.1021/acs.est.0c07816

Hydrogen isotopic exchange kinetics between organic matter and water: Implications for chemical evolution during meteorite parent body processing

Kebukawa, Y., Kobayashi, S., Kawasaki, N., Wang, Y., Yurimoto, H., & Cody, G. D. (2021). Hydrogen isotopic exchange kinetics between organic matter and water: Implications for chemical evolution during meteorite parent body processing. Meteoritics & Planetary Science. doi:10.1111/maps.13629

Organic matter and water from asteroid Itokawa

Chan, Q. H. S., Stephant, A., Franchi, I. A., Zhao, X., Brunetto, R., Kebukawa, Y., … Grady, M. M. (2021). Organic matter and water from asteroid Itokawa. Scientific Reports, 11(1), None. doi:10.1038/s41598-021-84517-x

The future lifespan of Earth’s oxygenated atmosphere

Ozaki, K., & Reinhard, C. T. (2021). The future lifespan of Earth’s oxygenated atmosphere. Nature Geoscience, 14(3), 138–142. doi:10.1038/s41561-021-00693-5

A 200-million-year delay in permanent atmospheric oxygenation

Poulton, S. W., Bekker, A., Cumming, V. M., Zerkle, A. L., Canfield, D. E., & Johnston, D. T. (2021). A 200-million-year delay in permanent atmospheric oxygenation. Nature. doi:10.1038/s41586-021-03393-7

To cool is to keep: residual H/He atmospheres of super-Earths and sub-Neptunes

Misener, W., & Schlichting, H. E. (2021). To cool is to keep: residual H/He atmospheres of super-Earths and sub-Neptunes. Monthly Notices of the Royal Astronomical Society, 503(4), 5658–5674. doi:10.1093/mnras/stab895

February 2021Geological Factors Impacted Cadmium Availability and use as an Alternative Cofactor for Zinc in the Carbon Fixation Pathways of Marine Diatoms

Srivastava, N., Spielman, S. J., Morrison, S. M., & Moore, E. K. (2021). Geological Factors Impacted Cadmium Availability and use as an Alternative Cofactor for Zinc in the Carbon Fixation Pathways of Marine Diatoms. Journal of Geophysical Research: Biogeosciences, 126(2), None. doi:10.1029/2020jg005966

Orogenic quiescence in Earth’s middle age

Tang, M., Chu, X., Hao, J., & Shen, B. (2021). Orogenic quiescence in Earth’s middle age. Science, 371(6530), 728–731. doi:10.1126/science.abf1876

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