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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July 2015 THE VOLATILE COMPOSITION OF COMET C/2003 K4 (LINEAR) AT NEAR-IR WAVELENGTHS—COMPARISONS WITH RESULTS FROM THE NANÇAY RADIO TELESCOPE AND FROM THE ODIN , SPITZER , AND SOHO SPACE OBSERVATORIES

Paganini, L., Mumma, M. J., Villanueva, G. L., DiSanti, M. A., & Bonev, B. P. (2015). The Astrophysical Journal, 808(1), 1. doi:10.1088/0004-637x/808/1/1

Statistical analysis of iron geochemical data suggests limited late Proterozoic oxygenation

Sperling, E. A., Wolock, C. J., Morgan, A. S., Gill, B. C., Kunzmann, M., Halverson, G. P., … Macdonald, F. A. (2015). Nature, 523(7561), 451–454. doi:10.1038/nature14589

Climate Conditions at Perennially Ice-Covered Lake Untersee, East Antarctica

Andersen, D. T., McKay, C. P., & Lagun, V. (2015). Journal of Applied Meteorology and Climatology, 54(7), 1393–1412. doi:10.1175/jamc-d-14-0251.1

First exoplanet transit observation with the Stratospheric Observatory for Infrared Astronomy: confirmation of Rayleigh scattering in HD 189733 b with the High-Speed Imaging Photometer for Occultations

Angerhausen, D., Mandushev, G., Mandell, A., Dunham, E., Becklin, E., Collins, P., … Hamilton, R. (2015). Journal of Astronomical Telescopes, Instruments, and Systems, 1(3), 034002. doi:10.1117/1.jatis.1.3.034002

Surface evolution of salt-encrusted playas under extreme and continued dryness

Artieda, O., Davila, A., Wierzchos, J., Buhler, P., Rodríguez-Ochoa, R., Pueyo, J., & Ascaso, C. (2015). Earth Surface Processes and Landforms, 40(14), 1939–1950. doi:10.1002/esp.3771

A Geomimetic Approach to the Formation and Identification of Fossil Sterane Biomarkers in Crude Oil: 18- nor - D - homo -Androstane and 5α,14β-Androstane

Bender, M., Schmidtmann, M., Summons, R. E., Rullkötter, J., & Christoffers, J. (2015). Chem. Eur. J., 21(35), 12501–12508. doi:10.1002/chem.201502148

Patterns of sulfur isotope fractionation during microbial sulfate reduction

Bradley, A. S., Leavitt, W. D., Schmidt, M., Knoll, A. H., Girguis, P. R., & Johnston, D. T. (2015). Geobiology, 14(1), 91–101. doi:10.1111/gbi.12149

RNA Oligomerization in Laboratory Analogues of Alkaline Hydrothermal Vent Systems

Burcar, B. T., Barge, L. M., Trail, D., Watson, E. B., Russell, M. J., & McGown, L. B. (2015). Astrobiology, 15(7), 509–522. doi:10.1089/ast.2014.1280

The Composition of Comets

Cochran, A. L., Levasseur-Regourd, A-C., Cordiner, M., Hadamcik, E., Lasue, J., Gicquel, A., … Schleicher, D. G. (2015). Space Sci Rev, 197(1-4), 9–46. doi:10.1007/s11214-015-0183-6

When and how did the terrestrial mid-Permian mass extinction occur? Evidence from the tetrapod record of the Karoo Basin, South Africa

Day, M. O., Ramezani, J., Bowring, S. A., Sadler, P. M., Erwin, D. H., Abdala, F., & Rubidge, B. S. (2015). Proc. R. Soc. B, 282(1811), 20150834. doi:10.1098/rspb.2015.0834

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