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DTSTART;VALUE=DATE:20260805
DTEND;VALUE=DATE:20260806
DTSTAMP:20260814T095750Z
CREATED:20260804T235425Z
LAST-MODIFIED:20260814T095750Z
UID:143607-1785888000-1785974399@www.a3veen.nl
SUMMARY:Life 2.0: A Scalable Distributed Space-Telescope Array for Biosignature Spectroscopy - publication
DESCRIPTION:Answering the question “Are we alone?” requires atmospheric spectroscopy of nearby terrestrial planets\, scientists conclude in the report ‘Life 2.0: A Scalable Distributed Space-Telescope Array for Biosignature Spectroscopy‘. \nFor an Earth–Sun analog\, even the strongest transmission signals are expected to be of order 1 part per million (ppm). Unlike short-period planets\, Earth 2.0 planets transit only about once per year\, so single-transit sensitivity\, rather than stacking repeated observations\, is the fundamental design driver. Life 2.0 is a scalable space-mission concept linking Earth 2.0 candidates discovered by PLATO and the Earth 2.0 (ET) mission with atmospheric characterization and biosignature assessment. The baseline architecture comprises 900 one-meter space telescopes\, each equipped with a high-throughput Waveguide Integrated Miniature Spectrograph and an ultra-low-read-noise CMOS detector. After independent calibration\, spectra acquired simultaneously during a transit are combined\, providing the photon-collecting capability of an approximately 30-m aperture at the selected spectral resolution while retaining a modular architecture. The baseline 0.2–1.05 μm range covers O3\, O2\, H2O\, Rayleigh scattering\, and other diagnostics\, with extension into the infrared as detector technologies mature. Prototype Waveguide Spectral Lens devices have demonstrated 40–66% throughput at resolving powers from R∼200 to R∼20\,000. Lightweight silicon-carbide mirrors and sub-electron-noise CMOS detectors support replicated production. Life 2.0 must address detector systematics\, instrument stability\, and stellar variability; rather than assuming these limitations disappear\, it builds on calibration\, detector-characterization\, and data-analysis techniques advanced during the JWST era. The concept offers a scalable alternative to a monolithic 30-m-class space telescope and a staged pathway toward biosignature spectroscopy of nearby Earth-like planets. \nLinks:\nAnswering the question “Are we alone?” requires atmospheric spectroscopy of nearby terrestrial planets \nNine Hundred Telescopes and One Chance a Year
URL:https://www.a3veen.nl/event/life-2-0-a-scalable-distributed-space-telescope-array-for-biosignature-spectroscopy-publication/
CATEGORIES:Astronomie,Bibliotheek,Exoplaneet,kennis
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