Abstract：
:Like all low- and moderate-mass stars, the Sun will burn as a red giant during its later evolution, generating of solar luminosities for some tens of millions of years. During this post-main sequence phase, the habitable (i.e., liquid water) thermal zone of our Solar System will lie in the region where Triton, Pluto-Charon, and Kuiper Belt objects orbit. Compared with the 1 AU habitable zone where Earth resides, this "delayed gratification habitable zone" (DGHZ) will enjoy a far less biologically hazardous environment - with lower harmful radiation levels from the Sun, and a far less destructive collisional environment. Objects like Triton, Pluto-Charon, and Kuiper Belt objects, which are known to be rich in both water and organics, will then become possible sites for biochemical and perhaps even biological evolution. The Kuiper Belt, with >10(5) objects > or =50 km in radius and more than three times the combined surface area of the four terrestrial planets, provides numerous sites for possible evolution once the Sun's DGHZ reaches it. The Sun's DGHZ might be thought to only be of academic interest owing to its great separation from us in time. However, approximately 10(9) Milky Way stars burn as luminous red giants today. Thus, if icy-organic objects are common in the 20-50 AU zones of these stars, as they are in our Solar System (and as inferred in numerous main sequence stellar disk systems), then DGHZs may form a niche type of habitable zone that is likely to be numerically common in the Galaxy.
journal_name
Astrobiologyjournal_title
Astrobiologyauthors
Stern SAdoi
10.1089/153110703769016406keywords:
subject
Has Abstractpub_date
2003-07-01 00:00:00pages
317-21issue
2eissn
1531-1074issn
1557-8070journal_volume
3pub_type
杂志文章相关文献
ASTROBIOLOGY文献大全abstract：:Recent measurements of methane (CH4) by the Mars Science Laboratory (MSL) now confront us with robust data that demand interpretation. Thus far, the MSL data have revealed a baseline level of CH4 (∼0.4 parts per billion by volume [ppbv]), with seasonal variations, as well as greatly enhanced spikes of CH4 with peak ab...
journal_title：Astrobiology
pub_type： 杂志文章,评审
doi：10.1089/ast.2018.1917
更新日期：2018-10-01 00:00:00
abstract：:Antarctic subglacial lakes are often considered suitable analogues to extraterrestrial subglacial aqueous environments. Recently, an environmentally friendly RECoverable Autonomous Sonde (RECAS) was designed at the Polar Research Center of Jilin University (JLU) to sample the water of subglacial lakes without contamin...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2019.2103
更新日期：2020-01-01 00:00:00
abstract：UNLABELLED:We developed a prototype instrument called the Standoff Biofinder, which can quickly locate biological material in a 500 cm(2) area from a 2 m standoff distance with a detection time of 0.1 s. All biogenic materials give strong fluorescence signals when excited with UV and visible lasers. In addition, the lu...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2015.1400
更新日期：2016-09-01 00:00:00
abstract：:In recent years, studies have shown that there are many similarities between comets and asteroids. In some cases, it cannot even be determined to which of these groups an object belongs. This is especially true for objects found beyond the main asteroid belt. Because of the lack of comet fragments, more progress has b...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2015.1354
更新日期：2016-04-01 00:00:00
abstract：:The aim of this study was to analyze tolerance to heavy ions in desiccated animals of the eutardigrade Richtersius coronifer and the bdelloid rotifer Mniobia russeola within the STARLIFE project. Both species were exposed to iron (Fe) and helium (He) ions at the Heavy Ion Medical Accelerator in Chiba (HIMAC) in Chiba,...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2015.1462
更新日期：2017-02-01 00:00:00
abstract：:Two terrestrial environments that have been proposed as analogs for the iron oxide precipitation in the Meridiani Planum region of Mars include the Rio Tinto precipitates and southern Utah marble concretions. Samples of two typical Utah iron oxide concretions and iron oxide precipitates in contact with biofilms from R...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2006.6.527
更新日期：2006-08-01 00:00:00
abstract：:Evaporation of silica-rich geothermal waters is one of the main abiotic drivers of the formation of silica sinters around hot springs. An important role in sinter structural development is also played by the indigenous microbial communities, which are fossilized and eventually encased in the silica matrix. The combina...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2012.0887
更新日期：2013-02-01 00:00:00
abstract：UNLABELLED:An approach to the origin of life, focused on the property of entities capable of reproducing themselves far from equilibrium, has been developed recently. Independently, the possibility of the emergence of life in the hydrothermal systems possibly present in the deep oceans below the frozen crust of some of...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2015.1412
更新日期：2016-05-01 00:00:00
abstract：:Knowledge and understanding of the martian environment has advanced greatly over the past two decades, beginning with NASA's return to the surface of Mars with the Pathfinder mission and its rover Sojourner in 1997 and continuing today with data being returned by the Curiosity rover. Reduced carbon, however, is yet to...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2014.1220
更新日期：2015-06-01 00:00:00
abstract：:Tetrapyrroles are essential to basic biochemical processes such as electron transfer and photosynthesis. However, it is not known whether these evolutionary old molecules have a prebiotic origin. We have serendipitously obtained pyrroles, which are the corresponding monomers, in laboratory experiments that simulated t...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2012.0934
更新日期：2013-06-01 00:00:00
abstract：:The NASA Astrobiology Roadmap provides guidance for research and technology development across the NASA enterprises that encompass the space, Earth, and biological sciences. The ongoing development of astrobiology roadmaps embodies the contributions of diverse scientists and technologists from government, universities...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/153110703769016299
更新日期：2003-07-01 00:00:00
abstract：:Water is the fundamental molecule for life on Earth. Thus, the search for hibernating life-forms in waterless environments is an important research topic for astrobiology. To date, however, the organizational patterns containing microbial life in extremely dry places, such as the deserts of Earth, the Dry Valleys of A...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2014.1162
更新日期：2014-07-01 00:00:00
abstract：:Equilibrium adsorption isotherm data for the purine base adenine has been obtained on several prebiotically relevant minerals by frontal analysis using water as a mobile phase. Adenine is far displaced toward adsorption on pyrite (FeS2), quartz (SiO2), and pyrrhotite (FeS), but somewhat less for magnetite (Fe3O4) and ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/153110701753593874
更新日期：2001-01-01 00:00:00
abstract：:Over the past few years a series of searches for interstellar radio beacons have taken place using the Parkes radio telescope. Here we report hitherto unpublished results from a search for optical beacons from 60 solar-type stars using the Perth-Lowell telescope. We discuss the significance of the null results from th...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/153110702762027880
更新日期：2002-10-01 00:00:00
abstract：:Chocolate Pots hot spring (CP) is an Fe-rich, circumneutral-pH geothermal spring in Yellowstone National Park. Relic hydrothermal systems have been identified on Mars, and modern hydrothermal environments such as CP are useful for gaining insight into potential pathways for generation of biosignatures of ancient micro...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2019.2058
更新日期：2021-01-01 00:00:00
abstract：:In June 2003, the geochemical composition of geothermal fluids was determined at 9 sites in the Vulcano hydrothermal system, including sediment seeps, geothermal wells, and submarine vents. Compositional data were combined with standard state reaction properties to determine the overall Gibbs free energy (DeltaG(r) ) ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2007.0128
更新日期：2007-12-01 00:00:00
abstract：UNLABELLED:Permafrost-affected soils are characterized by a high abundance and diversity of methanogenic communities, which are considered suitable model organisms for potential life on Mars. Methanogens from Siberian permafrost have been proven to be highly resistant against divers stress conditions such as subzero te...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2015.1319
更新日期：2015-11-01 00:00:00
abstract：:We observed 20-200 m sized low-albedo seepage-like streaks and their annual change on defrosting polar dunes in the southern hemisphere of Mars, based on the Mars Orbiter Camera (MOC), High Resolution Stereo Camera (HRSC), and High Resolution Imaging Science Experiment (HiRISE) images. The structures originate from da...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2007.0212
更新日期：2009-01-01 00:00:00
abstract：:The primary objective of NASA's Mars Science Laboratory (MSL) mission, which will launch in 2011, is to characterize the habitability of a site on Mars through detailed analyses of the composition and geological context of surface materials. Within the framework of established mission goals, we have evaluated the valu...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2010.0491
更新日期：2010-09-01 00:00:00
abstract：:We review the in situ geochronology experiments conducted by the Mars Science Laboratory mission's Curiosity rover to understand when the Gale Crater rocks formed, underwent alteration, and became exposed to cosmogenic radiation. These experiments determined that the detrital minerals in the sedimentary rocks of Gale ...
journal_title：Astrobiology
pub_type： 杂志文章,评审
doi：10.1089/ast.2018.1871
更新日期：2019-11-01 00:00:00
abstract：:Nitrogen is the major component of Earth's atmosphere and plays important roles in biochemistry. Biological systems have evolved a variety of mechanisms for fixing and recycling environmental nitrogen sources, which links them tightly with terrestrial nitrogen reservoirs. However, prior to the emergence of biology, al...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2017.1700
更新日期：2018-07-01 00:00:00
abstract：:The EPOXI Discovery Mission of Opportunity reused the Deep Impact flyby spacecraft to obtain spatially and temporally resolved visible photometric and moderate resolution near-infrared (NIR) spectroscopic observations of Earth. These remote observations provide a rigorous validation of whole-disk Earth model simulatio...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2011.0642
更新日期：2011-06-01 00:00:00
abstract：:We launched a cryptoendolithic habitat, made of a gneissic impactite inoculated with Chroococcidiopsis sp., into Earth orbit. After orbiting the Earth for 16 days, the rock entered the Earth's atmosphere and was recovered in Kazakhstan. The heat of entry ablated and heated the rock to a temperature well above the uppe...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2006.0038
更新日期：2007-02-01 00:00:00
abstract：:The aim of this study was to examine team functioning within the context of the AMADEE 18 Mars analog project, which took place in Oman in the winter of 2018. Five "Analog Astronauts" participated in this study. Each completed measures of individual-level variables, including demographics and personality, before the s...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2019.2035
更新日期：2020-11-01 00:00:00
abstract：:Antibody microarrays are becoming frequently used tools for analytical purposes. A key factor for optimal performance is the stability of the immobilized (capturing) antibodies as well as those that have been fluorescently labeled to achieve the immunological test (tracers). This is especially critical for long-distan...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2011.0647
更新日期：2011-10-01 00:00:00
abstract：:Small-scale terracing (microterracettes) is a surface geomorphic feature that recurs under a range of environmental settings, such as those existing in high to low temperature geothermal springs and evaporitic environments, through the single or combined action of physicochemical agents and microbiological processes. ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2017.1646
更新日期：2018-10-01 00:00:00
abstract：:Short-term and long-term science plans were developed as part of the strategic planning process used by the Biologic Analog Science Associated with Lava Terrains (BASALT) science team to conduct two Mars-simulation missions investigating basalt habitability at terrestrial volcanic analog sites in 2016. A multidiscipli...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2018.1850
更新日期：2019-03-01 00:00:00
abstract：UNLABELLED:Fluid inclusions trapped in ancient halite can contain a community of halophilic prokaryotes and eukaryotes that inhabited the surface brines from which the halite formed. Long-term survival of bacteria and archaea and preservation of DNA have been reported from halite, but little is known about the distribu...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2015.1397
更新日期：2016-06-01 00:00:00
abstract：:Water, vital for life, not only maintains the integrity of structural and metabolic biomolecules, it also transports them in solution or colloidal suspension. Any flow of water through a dormant or fossilized microbial community elutes molecules that are potentially recognizable as biomarkers. We hypothesize that the ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/153110701753198936
更新日期：2001-07-01 00:00:00
abstract：:We revisit the validity of the presence of O(2) or O(3) in the atmosphere of a rocky planet as being a biosignature. Up to now, the false positive that has been identified applies to a planet during a hot greenhouse runaway, which is restricted to planets outside the habitable zone (HZ) of the star that are closer to ...
journal_title：Astrobiology
pub_type： 杂志文章
doi：10.1089/ast.2010.0516
更新日期：2011-05-01 00:00:00
