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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September 2019Bright Southern Variable Stars in the bRing Survey

Mellon, S. N., Mamajek, E. E., Stuik, R., Zwintz, K., Kenworthy, M. A., J. Talens, G. J., … Ireland, M. J. (2019). Bright Southern Variable Stars in the bRing Survey. The Astrophysical Journal Supplement Series, 244(1), 15. doi:10.3847/1538-4365/ab3662

OSSOS. XIX. Testing Early Solar System Dynamical Models Using OSSOS Centaur Detections

Nesvorný, D., Vokrouhlický, D., Stern, A. S., Davidsson, B., Bannister, M. T., Volk, K., … Alexandersen, M. (2019). OSSOS. XIX. Testing Early Solar System Dynamical Models Using OSSOS Centaur Detections. The Astronomical Journal, 158(3), 132. doi:10.3847/1538-3881/ab3651

The Impact of Stripped Cores on the Frequency of Earth-size Planets in the Habitable Zone

Pascucci, I., Mulders, G. D., & Lopez, E. (2019). The Impact of Stripped Cores on the Frequency of Earth-size Planets in the Habitable Zone. The Astrophysical Journal, 883(1), L15. doi:10.3847/2041-8213/ab3dac

An Exo–Kuiper Belt with an Extended Halo around HD 191089 in Scattered Light

Ren, B., Choquet, É., Perrin, M. D., Duchêne, G., Debes, J. H., Pueyo, L., … Norman, C. (2019). An Exo–Kuiper Belt with an Extended Halo around HD 191089 in Scattered Light. The Astrophysical Journal, 882(1), 64. doi:10.3847/1538-4357/ab3403

Uranium isotope evidence for limited euxinia in mid-Proterozoic oceans

Gilleaudeau, G. J., Romaniello, S. J., Luo, G., Kaufman, A. J., Zhang, F., Klaebe, R. M., … Anbar, A. D. (2019). Uranium isotope evidence for limited euxinia in mid-Proterozoic oceans. Earth and Planetary Science Letters, 521, 150–157. doi:10.1016/j.epsl.2019.06.012

Genome Sequence of Mariprofundus sp. Strain EBB-1, a Novel Marine Autotroph Isolated from an Iron-Sulfur Mineral

Lopez, A., Albino, D., Beraki, S., Broomell, S., Canela, R., Dingmon, T., … Amend, J. P. (2019). Genome Sequence of Mariprofundus sp. Strain EBB-1, a Novel Marine Autotroph Isolated from an Iron-Sulfur Mineral. Microbiology Resource Announcements, 8(39), None. doi:10.1128/mra.00995-19

August 2019Aspartic acid racemization constrains long-term viability and longevity of endospores

Liang, R., Lau, M., Baars, O., Robb, F. T., & Onstott, T. C. (2019). Aspartic acid racemization constrains long-term viability and longevity of endospores. FEMS Microbiology Ecology. doi:10.1093/femsec/fiz132

Prebiotic amino acids bind to and stabilize prebiotic fatty acid membranes

Cornell, C. E., Black, R. A., Xue, M., Litz, H. E., Ramsay, A., Gordon, M., … Keller, S. L. (2019). Prebiotic amino acids bind to and stabilize prebiotic fatty acid membranes. Proceedings of the National Academy of Sciences, 116(35), 17239–17244. doi:10.1073/pnas.1900275116

Evolutionary Relationships Between Low Potential Ferredoxin and Flavodoxin Electron Carriers

Campbell, I. J., Bennett, G. N., & Silberg, J. J. (2019). Evolutionary Relationships Between Low Potential Ferredoxin and Flavodoxin Electron Carriers. Frontiers in Energy Research, 7, None. doi:10.3389/fenrg.2019.00079

How to resurrect ancestral proteins as proxies for ancient biogeochemistry

Garcia, A. K., & Kaçar, B. (2019). How to resurrect ancestral proteins as proxies for ancient biogeochemistry. Free Radical Biology and Medicine, 140, 260–269. doi:10.1016/j.freeradbiomed.2019.03.033

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