19 papers · ranked by Valyu relevance
Guillermo Gonzalez
Our understanding of the processes that are relevant to the formation and maintenance of habitable planetary systems is advancing at a rapid pace, both from observation and theory. The present review focuses on recent research that bears on this topic and includes discussions of processes occurring in astrophysical…
Dirk Schulze-Makuch, René Heller, Edward Guinan
The fact that Earth is teeming with life makes it appear odd to ask whether there could be other planets in our galaxy that may be even more suitable for life. Neglecting this possible class of “superhabitable” planets, however, could be considered anthropocentric and geocentric biases. Most important from the…
Abel Méndez, E. G. Rivera‐Valentín, Dirk Schulze‐Makuch, J. Filiberto + 30 more
'J. Filiberto' 'Ramses M. Ramírez' 'Tana E. Wood' 'Alfonso F. Dávila' 'Christopher P. McKay' 'Kevin Ortiz Ceballos' 'Marcos Jusino-Maldonado' 'Nicole J. Torres-Santiago' 'Guillermo Nery' 'René Heller' 'P. K. Byrne' 'Michael J. Malaska' 'Erica Nathan' 'Marta Filipa Simões' 'André Antunes' 'Jesús Martínez‐Frías' 'L.…
Daniel Apai, Rory Barnes, Matthew M. Murphy, Tim Lichtenberg + 12 more
'Noah Tuchow' 'Regis Ferriere' 'Kevin Wagner' 'Antonin Affholder' 'Renu Malhotra' 'Baptiste Journaux' 'Allona Vazan' 'Ramses Ramirez' 'Abel Mendez' 'Stephen R. Kane' 'Veronica H. Klawender' 'NExSS Quantitative Habitability Science Working Group'] Daniel Apai ´ , 1, 2, 3 Rory Barnes , 4 Matthew M. Murphy , 1, 3 Tim…
Edgard G. Rivera-Valentín, Justin Filiberto, Kennda L. Lynch, Irena Mamajanov + 3 more
The physical processes active during the first billion years (FBY) of Earth's history, such as accretion, differentiation, and impact cratering, provide constraints on the initial conditions that were conducive to the formation and establishment of life on Earth. This motivated the Lunar and Planetary Institute's FBY…
L.E. Ratliff, A.H. Fulford, C.I. Pozarycki, G. Wimp + 3 more
To define the boundaries of habitability, biologists often search for highly specialized organisms in extreme environments. However, negative life detections—when a method is unable to detect microorganisms in a given setting—are just as important to constrain the environmental limits of life on Earth. In turn, these…
Samuel Arbesman, Gregory Laughlin, Enrico Scalas
Background The search for a habitable extrasolar planet has long interested scientists, but only recently have the tools become available to search for such planets. In the past decades, the number of known extrasolar planets has ballooned into the hundreds, and with it, the expectation that the discovery of the first…
Abel Méndez, E. G. Rivera‐Valentín, Dirk Schulze‐Makuch, J. Filiberto + 31 more
'J. Filiberto' 'Ramses M. Ramírez' 'Tana E. Wood' 'Alfonso F. Dávila' 'Christopher P. McKay' 'Kevin Ortiz Ceballos' 'Marcos Jusino-Maldonado' 'Guillermo Nery' 'René Heller' 'P. K. Byrne' 'Michael J. Malaska' 'Erica Nathan' 'Marta Filipa Simões' 'André Antunes' 'Jesús Martínez‐Frías' 'L. Carone' 'N. R. Izenberg'…
Margarita Safonova, Archana Mathur, Suryoday Basak, Kakoli Bora + 1 more
'Surbhi Agrawal'] Abstract. What is habitability? Can we quantify it? What do we mean under the term habitable or potentially habitable planet? With estimates of the number of planets in our Galaxy alone running into billions, possibly a number greater than the number of stars, it is high time to start characterizing…
David Waltham
This paper presents statistical estimates for the location and duration of habitable zones (HZs) around stars of different mass. The approach is based upon the assumption that Earth's location, and the Sun's mass, should not be highly atypical of inhabited planets. The results support climate-model-based estimates for…
René Heller
In their recent comment, Cockell et al.1 argue that the habitability of an environment is fundamentally a binary property; that is to say, an environment can either support the metabolic processes of a given organism or not. The habitability of different environments, they argue, may have different degrees that could…
Rachel A. Moore, Christopher E. Carr
Several studies have reported new data on the estimated compositions of chemical components at Gale crater; however, there is still a lack of information regarding potential past support of biomass and detectable biomarkers of ancient life. In this study we evaluate microbial habitability of early Mars constrained by…
Nicholas B. Dragone, Melisa A. Diaz, Ian Hogg, W. Berry Lyons + 4 more
Microbes are widely assumed to be capable of colonizing even the most challenging terrestrial surface environments on Earth given enough time. We would not expect to find surface soils uninhabited by microbes as soils typically harbor diverse microbial communities and viable microbes have been detected in soils exposed…
Maodi Liang, Qinghua Cui
A recent study has revealed that Earth’s magnetic field strength and atmospheric oxygen level exhibit strongly correlated, linearly increasing trends (M-O relationship) over the past 540 million years. This discovery sheds new lights on the long-standing debate regarding whether a strong magnetic field is an essential…
Aoi Murakami, Yu Komatsu, Kenji Takizawa
The vegetation red-edge of terrestrial plants is a key biosignature for detecting Earth-like habitable exoplanets. Although water is essential for plants, an excess of water can limit the distribution of terrestrial vegetation. On planets with extensive water coverage and limited land, floating vegetation on the…
Holly R. Rucker, Tucker D. Ely, Douglas E. LaRowe, Donato Giovannelli + 1 more
Putative alkaline hydrothermal systems on Noachian Mars were potentially habitable environments for microorganisms. However, the types of reactions that could have fueled microbial life in such systems and the amount of energy available from them have not been quantitatively constrained. In this study, we use…
Authors not listed
Considering the harsh surface conditions on Mars, terrestrial organisms that can survive and remain detectable after exposure to similar conditions provide invaluable models for guiding current and future search-for-life missions. To this end, we evaluated the extremophilic archaeon Acidianus manzaensis grown on…
Amelia Carolina Sparavigna
Vivianite is a hydrated iron phosphate mineral (Fe3(PO4)2·8H2O), crystallized in a monoclinic system. It is the endmember of a mineral series known as the vivianite group, where minerals have the general formula A3(XO4)2·8H2O, A is a divalent metal cation and X is phosphorus P or arsenic As. Today, vivianite is…
Norio Kitadai, Takazo Shibuya, Hisahiro Ueda, Eiji Tasumi + 2 more
Abiotic synthesis of methanethiol through CO2 reduction is a presumptive initiation reaction of protometabolism in primordial ocean hydrothermal systems. However, reported artificial means of methanethiol production indicate the necessity of gas-phase condition, rather than aqueous-phase setting, for this prebiotic…