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 2017Trace Metal Imaging of Sulfate-Reducing Bacteria and Methanogenic Archaea at Single-Cell Resolution by Synchrotron X-Ray Fluorescence Imaging

Glass, J. B., Chen, S., Dawson, K. S., Horton, D. R., Vogt, S., Ingall, E. D., … Orphan, V. J. (2017). Trace Metal Imaging of Sulfate-Reducing Bacteria and Methanogenic Archaea at Single-Cell Resolution by Synchrotron X-Ray Fluorescence Imaging. Geomicrobiology Journal, None, 1–9. doi:10.1080/01490451.2017.1321068

A multielement isotopic study of refractory FUN and F CAIs: Mass-dependent and mass-independent isotope effects

Kööp, L., Nakashima, D., Heck, P. R., Kita, N. T., Tenner, T. J., Krot, A. N., … Davis, A. M. (2017). A multielement isotopic study of refractory FUN and F CAIs: Mass-dependent and mass-independent isotope effects. Geochimica et Cosmochimica Acta. doi:10.1016/j.gca.2017.04.029

The Chlorobiaceae, Chloroflexaceae, and Heliobacteriaceae

Madigan, M. T., Schaaf, N. A. V., & Matthew Sattley, W. (2017). The Chlorobiaceae, Chloroflexaceae, and Heliobacteriaceae. Modern Topics in the Phototrophic Prokaryotes, None, 139–161. doi:10.1007/978-3-319-46261-5_4

Uniform Silicon Isotope Ratios Across the Milky Way Galaxy

Monson, N. N., Morris, M. R., & Young, E. D. (2017). Uniform Silicon Isotope Ratios Across the Milky Way Galaxy. The Astrophysical Journal, 839(2), 123. doi:10.3847/1538-4357/aa67e6

Masses of Kepler-46b, c from Transit Timing Variations

Saad-Olivera, X., Nesvorný, D., Kipping, D. M., & Roig, F. (2017). Masses of Kepler-46b, c from Transit Timing Variations. The Astronomical Journal, 153(4), 198. doi:10.3847/1538-3881/aa64e0

False Negatives for Remote Life Detection on Ocean-Bearing Planets: Lessons from the Early Earth

Reinhard, C. T., Olson, S. L., Schwieterman, E. W., & Lyons, T. W. (2017). False Negatives for Remote Life Detection on Ocean-Bearing Planets: Lessons from the Early Earth. Astrobiology, 17(4), 287–297. doi:10.1089/ast.2016.1598

March 2017Escapement mechanisms and the conversion of disequilibria; the engines of creation

Branscomb, E., Biancalani, T., Goldenfeld, N., & Russell, M. (2017). Escapement mechanisms and the conversion of disequilibria; the engines of creation. Physics Reports, 677, 1–60. doi:10.1016/j.physrep.2017.02.001

A conodont-based revision of the 87 Sr/ 86 Sr seawater curve across the Permian-Triassic boundary

Dudás, F. Ö., Yuan, D-X., Shen, S-Z., & Bowring, S. A. (2017). A conodont-based revision of the 87 Sr/ 86 Sr seawater curve across the Permian-Triassic boundary. Palaeogeography, Palaeoclimatology, Palaeoecology, 470, 40–53. doi:10.1016/j.palaeo.2017.01.007

Geochemistry of Paleoproterozoic Gunflint Formation carbonate: Implications for hydrosphere-atmosphere evolution

Fralick, P., Planavsky, N., Burton, J., Jarvis, I., Addison, W. D., Barrett, T. J., & Brumpton, G. R. (2017). Geochemistry of Paleoproterozoic Gunflint Formation carbonate: Implications for hydrosphere-atmosphere evolution. Precambrian Research, 290, 126–146. doi:10.1016/j.precamres.2016.12.014

Ecological implications of hypoxia-triggered shifts in secondary metabolism

Gallagher, K. A., Wanger, G., Henderson, J., Llorente, M., Hughes, C. C., & Jensen, P. R. (2017). Ecological implications of hypoxia-triggered shifts in secondary metabolism. Environmental Microbiology. doi:10.1111/1462-2920.13700

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