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 2019Implications of Philae Magnetometry Measurements at Comet 67P/Churyumov–Gerasimenko for the Nebular Field of the Outer Solar System

Biersteker, J. B., Weiss, B. P., Heinisch, P., Herčik, D., Glassmeier, K-H., & Auster, H-U. (2019). Implications of Philae Magnetometry Measurements at Comet 67P/Churyumov–Gerasimenko for the Nebular Field of the Outer Solar System. The Astrophysical Journal, 875(1), 39. doi:10.3847/1538-4357/ab0f2a

Geochemical Sources and Availability of Amidophosphates on the Early Earth

Gibard, C., Jiménez, E. I., Kee, T., Krishnamurthy, R., & Pasek, M. (2019). Geochemical Sources and Availability of Amidophosphates on the Early Earth. Angewandte Chemie International Edition. doi:10.1002/anie.201903808

Searching for Atmospheric Bioindicators in Planets around the Two Nearby Stars, Proxima Centauri and Epsilon Eridani—Test Cases for Retrieval of Atmospheric Gases with Infrared Spectroscopy

Léger, A., Defrère, D., Muñoz, A. G., Godolt, M., Grenfell, J. L., Rauer, H., & Tian, F. (2019). Searching for Atmospheric Bioindicators in Planets around the Two Nearby Stars, Proxima Centauri and Epsilon Eridani—Test Cases for Retrieval of Atmospheric Gases with Infrared Spectroscopy. Astrobiology. doi:10.1089/ast.2018.1938

Potassium isotope fractionation during the high-temperature evaporation determined from the Trinity nuclear test

Chen, H., Meshik, A. P., Pravdivtseva, O. V., Day, J. M. D., & Wang, K. (2019). Potassium isotope fractionation during the high-temperature evaporation determined from the Trinity nuclear test. Chemical Geology. doi:10.1016/j.chemgeo.2019.04.028

Mechanisms Leading to a Warmer Climate on High-obliquity Planets

Kang, W. (2019). Mechanisms Leading to a Warmer Climate on High-obliquity Planets. The Astrophysical Journal, 876(1), L1. doi:10.3847/2041-8213/ab18a8

Early diagenetic sequestration of microbial mat lipid biomarkers through covalent binding into insoluble macromolecular organic matter (IMOM) as revealed by sequential chemolysis and catalytic hydropyrolysis

Lee, C., Love, G. D., Jahnke, L. L., Kubo, M. D., & Des Marais, D. J. (2019). Early diagenetic sequestration of microbial mat lipid biomarkers through covalent binding into insoluble macromolecular organic matter (IMOM) as revealed by sequential chemolysis and catalytic hydropyrolysis. Organic Geochemistry. doi:10.1016/j.orggeochem.2019.04.002

Oxygen and Al‐Mg isotopic compositions of grossite‐bearing refractory inclusions from CO 3 chondrites

Simon, S. B., Krot, A. N., & Nagashima, K. (2019). Oxygen and Al‐Mg isotopic compositions of grossite‐bearing refractory inclusions from CO 3 chondrites. Meteoritics & Planetary Science. doi:10.1111/maps.13282

Laboratory evidence for co-condensed oxygen- and carbon-rich meteoritic stardust from nova outbursts

Haenecour, P., Howe, J. Y., Zega, T. J., Amari, S., Lodders, K., José, J., … Muto, A. (2019). Laboratory evidence for co-condensed oxygen- and carbon-rich meteoritic stardust from nova outbursts. Nature Astronomy. doi:10.1038/s41550-019-0757-4

Origin and Evolution of Long-period Comets

Vokrouhlický, D., Nesvorný, D., & Dones, L. (2019). Origin and Evolution of Long-period Comets. The Astronomical Journal, 157(5), 181. doi:10.3847/1538-3881/ab13aa

Formation of short-period planets by disc migration

Carrera, D., Ford, E. B., & Izidoro, A. (2019). Formation of short-period planets by disc migration. Monthly Notices of the Royal Astronomical Society, 486(3), 3874–3885. doi:10.1093/mnras/stz974

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