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 2019On the Mass Function, Multiplicity, and Origins of Wide-orbit Giant Planets

Wagner, K., Apai, D., & Kratter, K. M. (2019). On the Mass Function, Multiplicity, and Origins of Wide-orbit Giant Planets. The Astrophysical Journal, 877(1), 46. doi:10.3847/1538-4357/ab1904

Moving Beyond Definitions in the Search for Extraterrestrial Life

Cleland, C. E. (2019). Moving Beyond Definitions in the Search for Extraterrestrial Life. Astrobiology. doi:10.1089/ast.2018.1980

What makes a planet habitable?

Shahar, A., Driscoll, P., Weinberger, A., & Cody, G. (2019). What makes a planet habitable? Science, 364(6439), 434–435. doi:10.1126/science.aaw4326

A problematic animal fossil from the early Cambrian Hetang Formation, South China

Tang, Q., Hu, J., Xie, G., Yuan, X., Wan, B., Zhou, C., … Xiao, S. (2019). A problematic animal fossil from the early Cambrian Hetang Formation, South China. Journal of Paleontology, None, 1–11. doi:10.1017/jpa.2019.26

The tidal parameters of TRAPPIST-1 b and c

Brasser, R., Barr, A. C., & Dobos, V. (2019). The tidal parameters of TRAPPIST-1 b and c. Monthly Notices of the Royal Astronomical Society. doi:10.1093/mnras/stz1231

A Maximum Subsurface Biomass on Mars from Untapped Free Energy: CO and H2 as Potential Antibiosignatures

Sholes, S. F., Krissansen-Totton, J., & Catling, D. C. (2019). A Maximum Subsurface Biomass on Mars from Untapped Free Energy: CO and H2 as Potential Antibiosignatures. Astrobiology, 19(5), 655–668. doi:10.1089/ast.2018.1835

April 2019A role for phosphorus redox in emerging and modern biochemistry

Pasek, M. (2019). A role for phosphorus redox in emerging and modern biochemistry. Current Opinion in Chemical Biology, 49, 53–58. doi:10.1016/j.cbpa.2018.09.018

Living at the Extremes: Extremophiles and the Limits of Life in a Planetary Context

Merino, N., Aronson, H. S., Bojanova, D. P., Feyhl-Buska, J., Wong, M. L., Zhang, S., & Giovannelli, D. (2019). Living at the Extremes: Extremophiles and the Limits of Life in a Planetary Context. Frontiers in Microbiology, 10, None. doi:10.3389/fmicb.2019.00780

Ferrous oxide-rich asteroid achondrites

Day, J. M. D., Corder, C. A., Assayag, N., & Cartigny, P. (2019). Ferrous oxide-rich asteroid achondrites. Geochimica et Cosmochimica Acta. doi:10.1016/j.gca.2019.04.005

Forearc carbon sink reduces long-term volatile recycling into the mantle

Barry, P. H., De Moor, J. M., Giovannelli, D., Schrenk, M., Hummer, D. R., Lopez, T., … Lloyd, K. G. (2019). Forearc carbon sink reduces long-term volatile recycling into the mantle. Nature, 568(7753), 487–492. doi:10.1038/s41586-019-1131-5

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