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 2017An ongoing satellite–ring cycle of Mars and the origins of Phobos and Deimos

Hesselbrock, A. J., & Minton, D. A. (2017). An ongoing satellite–ring cycle of Mars and the origins of Phobos and Deimos. Nature Geoscience, 10(4), 266–269. doi:10.1038/ngeo2916

Biological regulation of atmospheric chemistry en route to planetary oxygenation

Izon, G., Zerkle, A. L., Williford, K. H., Farquhar, J., Poulton, S. W., & Claire, M. W. (2017). Biological regulation of atmospheric chemistry en route to planetary oxygenation. Proceedings of the National Academy of Sciences, 114(13), E2571–E2579. doi:10.1073/pnas.1618798114

Mid-infrared spectra of comet nuclei

Kelley, M. S. P., Woodward, C. E., Gehrz, R. D., Reach, W. T., & Harker, D. E. (2017). Mid-infrared spectra of comet nuclei. Icarus, 284, 344–358. doi:10.1016/j.icarus.2016.11.029

High-temperature rims around calcium–aluminum-rich inclusions from the CR, CB and CH carbonaceous chondrites

Krot, A. N., Nagashima, K., Van Kooten, E. M. M., & Bizzarro, M. (2017). High-temperature rims around calcium–aluminum-rich inclusions from the CR, CB and CH carbonaceous chondrites. Geochimica et Cosmochimica Acta, 201, 155–184. doi:10.1016/j.gca.2016.09.031

Low-temperature formation and stabilization of rare allotropes of cyclooctasulfur (β-S8 and γ-S8) in the presence of organic carbon at a sulfur-rich glacial site in the Canadian High Arctic

Lau, G. E., Cosmidis, J., Grasby, S. E., Trivedi, C. B., Spear, J. R., & Templeton, A. S. (2017). Low-temperature formation and stabilization of rare allotropes of cyclooctasulfur (β-S8 and γ-S8) in the presence of organic carbon at a sulfur-rich glacial site in the Canadian High Arctic. Geochimica et Cosmochimica Acta, 200, 218–231. doi:10.1016/j.gca.2016.11.036

53 Mn– 53 Cr chronology of Ca–Fe silicates in CV3 chondrites

MacPherson, G. J., Nagashima, K., Krot, A. N., Doyle, P. M., & Ivanova, M. A. (2017). 53 Mn– 53 Cr chronology of Ca–Fe silicates in CV3 chondrites. Geochimica et Cosmochimica Acta, 201, 260–274. doi:10.1016/j.gca.2016.09.032

Does the planetary dynamo go cycling on? Re-examining the evidence for cycles in magnetic reversal rate

Melott, A. L., Pivarunas, A., Meert, J. G., & Lieberman, B. S. (2017). Does the planetary dynamo go cycling on? Re-examining the evidence for cycles in magnetic reversal rate. International Journal of Astrobiology, None, 1–7. doi:10.1017/s1473550417000040

The Composition of Comet C/2012 K1 (PanSTARRS) and the Distribution of Primary Volatile Abundances Among Comets

Roth, N. X., Gibb, E. L., Bonev, B. P., DiSanti, M. A., Mumma, M. J., Villanueva, G. L., & Paganini, L. (2017). The Composition of Comet C/2012 K1 (PanSTARRS) and the Distribution of Primary Volatile Abundances Among Comets. The Astronomical Journal, 153(4), 168. doi:10.3847/1538-3881/aa5d18

Siderophore and Organic Acid Promoted Dissolution and Transformation of Cr(III)-Fe(III)-(oxy)hydroxides

Saad, E. M., Sun, J., Chen, S., Borkiewicz, O. J., Zhu, M., Duckworth, O. W., & Tang, Y. (2017). Siderophore and Organic Acid Promoted Dissolution and Transformation of Cr(III)-Fe(III)-(oxy)hydroxides. Environmental Science & Technology, 51(6), 3223–3232. doi:10.1021/acs.est.6b05408

On the origins of oxygenic photosynthesis and aerobic respiration in Cyanobacteria

Soo, R. M., Hemp, J., Parks, D. H., Fischer, W. W., & Hugenholtz, P. (2017). On the origins of oxygenic photosynthesis and aerobic respiration in Cyanobacteria. Science, 355(6332), 1436–1440. doi:10.1126/science.aal3794

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