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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November 2022The fate of nitrogen during parent body partial melting and accretion of the inner solar system bodies at reducing conditions

Dasgupta, R., Falksen, E., Pal, A., & Sun, C. (2022). The fate of nitrogen during parent body partial melting and accretion of the inner solar system bodies at reducing conditions. Geochimica et Cosmochimica Acta, 336, 291–307. doi:10.1016/j.gca.2022.09.012

Photochemistry in Hot H2-dominated Exoplanet Atmospheres

Fleury, B., Gudipati, M.S., Henderson, B.L., & Swain, M. (2022). Photochemistry in Hot H2-dominated Exoplanet Atmospheres. The Astrophysical Journal, 871, 2. doi: 10.3847/1538-4357/aaf79f

Biological Oxidation of Fe(II)-Bearing Smectite by Microaerophilic Iron Oxidizer Sideroxydans lithotrophicus Using Dual Mto and Cyc2 Iron Oxidation Pathways

Gawronska, A. J., McLeod, C. L., Blumenfeld, E. H., Hanna, R. D., & Zeigler, R. A. (2022). New interpretations of lunar mare basalt flow emplacement from XCT analysis of Apollo samples. Icarus, 388, 115216. doi:10.1016/j.icarus.2022.115216 Zhou, N. , Kupper, R.J., Catalano, J.G., Thompson, A., Chan, C.S. (2022). Biological Oxidation of Fe(II)-Bearing Smectite by Microaerophilic Iron Oxidizer Sideroxydans lithotrophicus Using Dual Mto and Cyc2 Iron Oxidation Pathways. Environmental Science & Technology, 10.1021/acs.est.2c05142

Internal or external magma oceans in the earliest protoplanets – Perspectives from nitrogen and carbon fractionation

Grewal, D. S., Seales, J. D., & Dasgupta, R. (2022). Internal or external magma oceans in the earliest protoplanets – Perspectives from nitrogen and carbon fractionation. Earth and Planetary Science Letters, 598, 117847. doi:10.1016/j.epsl.2022.117847

Ryugu’s nucleosynthetic heritage from the outskirts of the Solar System

Hopp, T., Dauphas, N., Abe, Y., AléOn, J., O’D. Alexander, C. M., Amari, S., … Yurimoto, H. (2022). Ryugu’s nucleosynthetic heritage from the outskirts of the Solar System. Science Advances, 8(46), None. doi:10.1126/sciadv.add8141

The Exoplanet Radius Valley from Gas-driven Planet Migration and Breaking of Resonant Chains

Izidoro, A., Schlichting, H. E., Isella, A., Dasgupta, R., Zimmermann, C., & Bitsch, B. (2022). The Exoplanet Radius Valley from Gas-driven Planet Migration and Breaking of Resonant Chains. The Astrophysical Journal Letters, 939(2), L19. doi:10.3847/2041-8213/ac990d

Accreting protoplanets: Spectral signatures and magnitude of gas and dust extinction at H α

Marleau, G.-D. , Aoyama, Y., Kuiper, R., Follette, K., Turner, N. J., Cugno, G., Manara, C. F., Haffert, S. Y., Kitzmann, D., Ringqvist, S. C., Wagner, K. R., van Boekel, R., Sallum, S., Janson, M., Schmidt, T. O. B., Venuti, L., Lovis, Ch., & Mordasini, C. (2022). Accreting protoplanets: Spectral signatures and magnitude of gas and dust extinction at H α. Astronomy & Astrophysics, 657, A38. doi: 10.1051/0004-6361/202037494

Buffering of mantle conditions through water cycling and thermal feedbacks maintains magmatism over geologic time

Seales, J., Lenardic, A., & Richards, M. (2022). Buffering of mantle conditions through water cycling and thermal feedbacks maintains magmatism over geologic time. Communications Earth & Environment, 3(1), None. doi:10.1038/s43247-022-00617-0

Exploiting Unary Relations with Stacked Learning for Relation Extraction

Zhuang, Y., Riloff, E., Wagstaff, K., Francis, R., Golombek, M., Tamppari, L. (2022). Exploiting Unary Relations with Stacked Learning for Relation Extraction. Proceedings of the Third Workshop on Scholarly Document Processing, 126–137.

October 2022The Demographics of Kepler's Earths and Super-Earths into the Habitable Zone

Bergsten, G. J., Pascucci, I., Mulders, G. D., Fernandes, R. B., & Koskinen, T. T. (2022). The Demographics of Kepler's Earths and Super-Earths into the Habitable Zone. The Astronomical Journal, 164(5), 190. doi:10.3847/1538-3881/ac8fea

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