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 2010Early Earth: Faint young Sun redux

Kasting, J. F. (2010). Nature, 464(7289), 687–689. doi:10.1038/464687a

Modern and ancient DNA reveal recent partial replacement of caribou in the southwest Yukon

Kuhn, T. S., McFarlane, K. A., Groves, P., Mooers, A. Ø., & Shapiro, B. (2010). Molecular Ecology, 19(7), 1312–1323. doi:10.1111/j.1365-294x.2010.04565.x

A Younger Age for ALH84001 and Its Geochemical Link to Shergottite Sources in Mars

Lapen, T. J., Righter, M., Brandon, A. D., Debaille, V., Beard, B. L., Shafer, J. T., & Peslier, A. H. (2010). Science, 328(5976), 347–351. doi:10.1126/science.1185395

Ancient Sulfur Cycling and Oxygenation of the Early Biosphere

Lyons, T. W., & Gill, B. C. (2010). Elements, 6(2), 93–99. doi:10.2113/gselements.6.2.93

On the Origin of Primitive Cells: From Nutrient Intake to Elongation of Encapsulated Nucleotides

Meierhenrich, U. J., Filippi, J-J., Meinert, C., Vierling, P., & Dworkin, J. P. (2010). Angewandte Chemie International Edition, 49(22), 3738–3750. doi:10.1002/anie.200905465

Appraising the roles of nutrient availability, global change, and functional traits during the angiosperm rise to dominance

Mueller, K. E., Diefendorf, A. F., Freeman, K. H., & Eissenstat, D. M. (2010). Ecology Letters, 13(5), E1–E6. doi:10.1111/j.1461-0248.2010.01455.x

Stepwise [FeFe]-hydrogenase H-cluster assembly revealed in the structure of HydAΔEFG

Mulder, D. W., Boyd, E. S., Sarma, R., Lange, R. K., Endrizzi, J. A., Broderick, J. B., & Peters, J. W. (2010). Nature, 465(7295), 248–251. doi:10.1038/nature08993

The organic composition of Comet C/2000 WM1 (LINEAR) revealed through infrared spectroscopy

Radeva, Y. L., Mumma, M. J., Bonev, B. P., DiSanti, M. A., Villanueva, G. L., Magee-Sauer, K., … Gibb, E. L. (2010). Icarus, 206(2), 764–777. doi:10.1016/j.icarus.2009.09.014

Signatures of Arithmetic Simplicity in Metabolic Network Architecture

Riehl, W. J., Krapivsky, P. L., Redner, S., & Segrè, D. (2010). PLoS Computational Biology, 6(4), e1000725. doi:10.1371/journal.pcbi.1000725

No climate paradox under the faint early Sun

Rosing, M. T., Bird, D. K., Sleep, N. H., & Bjerrum, C. J. (2010). Nature, 464(7289), 744–747. doi:10.1038/nature08955

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