Bibliographic Details
| Title: |
Observational Constraints on the Great Filter. |
| Authors: |
Haqq-Misra J; Blue Marble Space Institute of Science, Seattle, Washington., Kopparapu RK; NASA Goddard Space Flight Center, Greenbelt, Maryland., Schwieterman E; Blue Marble Space Institute of Science, Seattle, Washington.; University of California at Riverside, Riverside, California. |
| Source: |
Astrobiology [Astrobiology] 2020 May; Vol. 20 (5), pp. 572-579. |
| Publication Type: |
Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
| Language: |
English |
| Journal Info: |
Publisher: Mary Ann Liebert, Inc Country of Publication: United States NLM ID: 101088083 Publication Model: Print Cited Medium: Internet ISSN: 1557-8070 (Electronic) Linking ISSN: 15578070 NLM ISO Abbreviation: Astrobiology Subsets: MEDLINE |
| Imprint Name(s): |
Original Publication: Larchmont, N.Y. : Mary Ann Liebert, Inc., c2001- |
| MeSH Terms: |
Evolution, Planetary* , Exobiology*, Extraterrestrial Environment ; Planets |
| Abstract: |
The search for spectroscopic biosignatures with the next generation of space telescopes could provide observational constraints on the abundance of exoplanets with signs of life. An extension of this spectroscopic characterization of exoplanets is the search for observational evidence of technology, known as technosignatures. Current mission concepts that would observe biosignatures from ultraviolet to near-infrared wavelengths could place upper limits on the fraction of planets in the Galaxy that host life, although such missions tend to have relatively limited capabilities of constraining the prevalence of technosignatures at mid-infrared wavelengths. Yet searching for technosignatures alongside biosignatures would provide important knowledge about the future of our civilization. If planets with technosignatures are abundant, then we can increase our confidence that the hardest step in planetary evolution-the Great Filter-is probably in our past. But if we find that life is commonplace while technosignatures are absent, then this would increase the likelihood that the Great Filter awaits to challenge us in the future. |
| Contributed Indexing: |
Keywords: Biosignatures; Exoplanets; Fermi paradox; Great Filter; Technosignatures |
| Entry Date(s): |
Date Created: 20200505 Date Completed: 20210610 Latest Revision: 20210610 |
| Update Code: |
20260130 |
| DOI: |
10.1089/ast.2019.2154 |
| PMID: |
32364797 |
| Database: |
MEDLINE |