Results 51 to 60 of about 11,414 (233)

Exoplanet Terra Incognita

, 2018
Exoplanet surface imaging, cartography and the search for exolife are the next frontiers of planetology and astrophysics. Here we present an over-view of ideas and techniques to resolve albedo features on exoplanetary surfaces.
A Carbognani, B-O Demory, C Burke, C Maccone, D Morrison, D Sirbu, DM Fluri, F Feng, F Pont, G Anglada-Escudé, H Kawahara, HA Knutson, HN Russell, IAG Snellen, IJM Crossfield, IJM Crossfield, J Harrington, J Krissansen-Totton, JC Schwartz, JL Grenfell, M Bonnefoy, M Kaasalainen, MF Sterzik, MW Buie, NB Cowan, NB Cowan, P Ingraham, R Heller, R Heller, SV Berdyugina, SV Berdyugina, SV Berdyugina, SV Berdyugina, T Karalidi, TM Evans, VR Eshleman, VS Meadows, Y Fujii   +37 more
core   +1 more source

Early evolution of purple retinal pigments on Earth and implications for exoplanet biosignatures

, 2018
We propose that retinal-based phototrophy arose early in the evolution of life on Earth, profoundly impacting the development of photosynthesis and creating implications for the search for life beyond our planet.
DasSarma, Shiladitya, Schwieterman, Edward W.   +1 more
core   +1 more source

Discriminating between extinct and extant life detection: implications for future Mars missions

Frontiers in Astronomy and Space Sciences
The search for biosignatures on Mars has been a high priority for astrobiology. The approach to detecting putative biosignatures has largely been focused on chemical analyses targeting predominantly extinct life.
Katherine A. Dzurilla, Bronwyn L. Teece
doaj   +1 more source

Surface and Temporal Biosignatures [PDF]

, 2018
Recent discoveries of potentially habitable exoplanets have ignited the prospect of spectroscopic investigations of exoplanet surfaces and atmospheres for signs of life. This chapter provides an overview of potential surface and temporal exoplanet biosignatures, reviewing Earth analogues and proposed applications based on observations and models.
openaire   +7 more sources

Exploring Fingerprints of the Extreme Thermoacidophile Metallosphaera sedula Grown on Synthetic Martian Regolith Materials as the Sole Energy Sources

Frontiers in Microbiology, 2017
The biology of metal transforming microorganisms is of a fundamental and applied importance for our understanding of past and present biogeochemical processes on Earth and in the Universe.
Denise Kölbl, Marc Pignitter, Veronika Somoza, Mario P. Schimak, Oliver Strbak, Amir Blazevic, Tetyana Milojevic   +6 more
doaj   +1 more source

Classification of the Biogenicity of Complex Organic Mixtures for the Detection of Extraterrestrial Life

Life, 2021
Searching for life in the Universe depends on unambiguously distinguishing biological features from background signals, which could take the form of chemical, morphological, or spectral signatures.
Nicholas Guttenberg, Huan Chen, Tomohiro Mochizuki, H. James Cleaves   +3 more
doaj   +1 more source

Detecting industrial pollution in the atmospheres of earth-like exoplanets

, 2014
Detecting biosignatures, such as molecular oxygen in combination with a reducing gas, in the atmospheres of transiting exoplanets has been a major focus in the search for alien life.
Abad, Gonzalo Gonzalez, Lin, Henry W., Loeb, Abraham   +2 more
core   +1 more source

Exoplanet Biosignatures: Future Directions [PDF]

Astrobiology, 2018
125 pages (double spaced), 12 figures; The paper is the fourth in a series of 5 review manuscripts of the NExSS Exoplanet Biosignatures Workshop.
Walker, Sara I., Bains, William, Cronin, Leroy, DasSarma, Shiladitya, Danielache, Sebastian, Domagal-Goldman, Shawn, Kacar, Betul, Kiang, Nancy Y., Lenardic, Adrian, Reinhard, Christopher T., Moore, William, Schwieterman, Edward W., Shkolnik, Evgenya L., Smith, Harrison B.   +13 more
openaire   +10 more sources

Quadruple Helix Inversions of Liquid Crystals Orchestrated by Direct Chirality Transmission of an Intrinsically Chiral Light‐Driven Molecular Machine

Advanced Materials, EarlyView.
A molecular motor with four‐state dynamic chirality is integrated into liquid crystals, enabling quadruple sequential helix inversions and high helical twisting power. Due to high motor efficiency, the supramolecular helicity can be controlled by near‐infrared light via upconversion nanoparticles, resulting in a robust, multistate, photoresponsive soft
Jinyu Sheng, Alexander Ryabchun, Guiying Long, Ben L. Feringa   +3 more
wiley   +1 more source

Exoplanet Biosignatures: A Framework for Their Assessment [PDF]

Astrobiology, 2018
Part of a NASA Nexus for Exoplanet System Science (NExSS) series of 5 papers.
Andrew Rushby, Joshua Krissansen-Totton, William Bains, Shiladitya DasSarma, Shawn Domagal-Goldman, David Crisp, Anthony D. Del Genio, Nancy Y. Kiang, David C. Catling, Tyler D. Robinson   +9 more
openaire   +5 more sources