Results 81 to 90 of about 27,747 (265)

Life Beyond the Solar System: Space Weather and Its Impact on Habitable Worlds [PDF]

, 2018
The search of life in the Universe is a fundamental problem of astrobiology and a major priority for NASA. A key area of major progress since the NASA Astrobiology Strategy 2015 (NAS15) has been a shift from the exoplanet discovery phase to a phase of ...
Airapetian, V. S., Alexander, D., Cohen, O., Danchi, W. C., Dong, C. F., Fahrenbach, A., France, K., Funke, B., Glocer, A., Grenfell, J. L., Gronoff, G., Guedel, M., Hallinan, G., Henning, W. G., Jackman, C., Jin, M., Johnstone, C., Kay, C., Kobayashi, K., Kuang, W., Leisawitz, D., Lueftinger, T., Lynch, B., Maehara, H., Manchester, C., Mlynczak, M., Notsu, Y., Puertas, M. Lopez, Rugheimer, S., Sojka, J., Stamenkovic, V., Stevenson, K. B., van der Holst, B., Verkhoglyadova, O., Yamashiki, Y., Zank, G.   +35 more
core   +1 more source

Lunar Palaeoregolith Deposits as Recorders of the Galactic Environment of the Solar System and Implications for Astrobiology [PDF]

, 2010
One of the principal scientific reasons for wanting to resume in situ exploration of the lunar surface is to gain access to the record it contains of early Solar System history. Part of this record will pertain to the galactic environment of the Solar System, including variations in the cosmic ray flux, energetic galactic events (e.g, supernovae and/or
arxiv   +1 more source

The Italian National Project of Astrobiology—Life in Space—Origin, Presence, Persistence of Life in Space, from Molecules to Extremophiles

Astrobiology, 2020
The ‘‘Life in Space’’ project was funded in the wake of the Italian Space Agency’s proposal for the development of a network of institutions and laboratories conceived to implement Italian participation in space astrobiology experiments.
S. Onofri, N. Balucani, V. Barone, P. Benedetti, D. Billi, A. Balbi, J. Brucato, B. Cobucci-Ponzano, G. Costanzo, N. L. Rocca, M. Moracci, R. Saladino, G. Vladilo   +12 more
semanticscholar   +1 more source

Astrobiology (Overview)

, 2021
Astrobiology seeks to understand the origin, evolution, distribution, and future of life in the universe and thus to integrate biology with planetary science, astronomy, cosmology, and the other physical sciences. The discipline emerged in the late 20th century, partly in response to the development of space exploration programs in the United States ...
openaire   +2 more sources

Constraining climate sensitivity and continental versus seafloor weathering using an inverse geological carbon cycle model

Nature Communications, 2017
The influence of tectonics, continental weathering, and seafloor weathering in the geological carbon cycle remain unclear. Here, the authors develop a new carbon cycle model and, through comparison with proxy data, critically evaluate the influence of ...
Joshua Krissansen-Totton, David C. Catling   +1 more
doaj   +1 more source

Variations in climate habitability parameters and their effect on Earth's biosphere during the Phanerozoic Eon

Scientific Reports, 2023
Essential insights on the characterization and quality of a detectable biosphere are gained by analyzing the effects of its environmental parameters. We compiled environmental and biological properties of the Phanerozoic Eon from various published data ...
Iva Vilović, Dirk Schulze-Makuch, René Heller   +2 more
doaj   +1 more source

Philosophical Aspects of Astrobiology Revisited

Philosophies, 2021
Given the idea that Life as we know it is nothing but a special form of a generically underlying dynamical structure within the physical Universe, we try to introduce a concept of Life that is not only derived from first principles of fundamental physics,
Rainer E. Zimmermann
doaj   +1 more source

A Case Study on the Impact of Interplanetary Coronal Mass Ejection on the Martian O(1S) 557.7 nm Dayglow Emission Using ExoMars TGO/NOMAD‐UVIS Observations: First Results

Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.
Abstract We report, for the first time, the impact of interplanetary coronal mass ejections (ICME) on the recently discovered O(1S) 557.7 nm dayglow emission in the Martian atmosphere. While there are a few studies on the seasonal variation of 557.7 nm dayglow emission available in the literature, the impact of ICME has not been investigated so far ...
Aadarsh Raj Sharma, Lot Ram, Harshaa Suhaag, Dipjyoti Patgiri, Lauriane Soret, Jean‐Claude Gérard, Ian R. Thomas, Ann Carine Vandaele, Sumanta Sarkhel   +8 more
wiley   +1 more source

Spaceflight from Super-Earths is difficult [PDF]

International Journal of Astrobiology 18 (2019) 393-395, 2018
Many rocky exoplanets are heavier and larger than the Earth, and have higher surface gravity. This makes space-flight on these worlds very challenging, because the required fuel mass for a given payload is an exponential function of planetary surface gravity.
arxiv   +1 more source

Viability and Motility of Escherichia coli Under Elevated Martian Salt Stresses

Life
This study investigates the effects of three Martian-relevant salts—sodium chlorate, sodium perchlorate, and sodium chloride—on the viability and motility of Escherichia coli, a model organism for understanding microbial responses to environmental stress.
Max Riekeles, Berke Santos, Sherif Al-Morssy Youssef, Dirk Schulze-Makuch   +3 more
doaj   +1 more source