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DTSTART;VALUE=DATE:20251210
DTEND;VALUE=DATE:20251211
DTSTAMP:20251228T225712Z
CREATED:20251210T223500Z
LAST-MODIFIED:20251228T225712Z
UID:134859-1765324800-1765411199@www.a3veen.nl
SUMMARY:The Eschatian Hypothesis - publication
DESCRIPTION:The research article titled “The Eschatian Hypothesis” explains that the first detection of an astrophysical object is usually not representative of the overall type. \nInstead\, we first tend to detect things with large observational signatures\, due to our detection methods and their biases. The history of astronomy is full of examples. The history of exoplanet detection illustrates the phenomenon. The very first exoplanets were found in the early 1990s orbiting pulsars. But now we know that those were not representative. In the NASA Exoplanet Archive of more than 6\,000 exoplanets\, fewer than 10 were found around pulsars. They were detected because pulsars are like exquisitely timed cosmic lighthouses\, and orbiting exoplanets altered that exquisite timing noticeably. It had nothing to do with how plentiful these types of planets are. For decades\, science fiction writers have tried their best to prepare us for eventual contact with aliens. Their efforts are dominated by several recurrent tropes. There’s the invasion by a warlike species\, there’s the highly evolved species trying to communicate with our primitive species\, there’s the benevolent aliens come to save us from ourselves\, and there’s the mischievous anal-probers and medical experimenters. But those examples are highly unlikely to represent first contact\, according to new thinking and research. Not just because they may be totally unrealistic\, but because of what might motivate another species to contact us\, and how that alters the observational signal they use to announce their presence. \n\nLinks:\nFirst Contact With an Alien Civilization Could Be ‘Loud’. Here’s Why
URL:https://www.a3veen.nl/event/the-eschatian-hypothesis-publication/
CATEGORIES:Astronomie,Exoplaneet
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BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20260416T200000
DTEND;TZID=Europe/Amsterdam:20260416T210000
DTSTAMP:20260417T082510Z
CREATED:20260416T082439Z
LAST-MODIFIED:20260417T082510Z
UID:139532-1776369600-1776373200@www.a3veen.nl
SUMMARY:Babelsberger Sternennächte – Exoplaneten-Atmosphären - Von regnenden Rubinen bis zur Suche nach Leben | Dr. Fabio Lesjak (TV webcast)
DESCRIPTION:Die Leibniz-Instituts für Astrophysik Potsdam (AIP) Babelsberger Sternennächte finden online statt\, in der Regel gibt es immer am 3. Donnerstag im Monat einen neuen Vortrag einer Wissenschaftlerin oder eines Wissenschaftlers des AIP\, der ab 20 Uhr auf dem YouTube-Kanal von Urknall\, Weltall und das Leben ausgestrahlt wird. \nDr. Fabio Lesjak\, Wissenschaftler in der Forschungsgruppe Sternphysik und Exoplaneten am AIP\, spricht zu „Exoplaneten-Atmosphären – Von regnenden Rubinen bis zur Suche nach Leben“. Ähnlich wie die Planeten in unserem Sonnensystem sind viele Exoplaneten von Atmosphären umgeben. Durch die Untersuchung dieser Atmosphären mit Hilfe hochauflösender Spektroskopie können Forschende Rückschlüsse auf die Zusammensetzung der Atmosphäre\, ihre Temperatur und sogar über vorherrschende Winde ziehen. \n\nLinks:\nBabelsberger Sternennächte \nBabelsberger Sternennächte – playlist
URL:https://www.a3veen.nl/event/babelsberger-sternennachte-exoplaneten-atmospharen-von-regnenden-rubinen-bis-zur-suche-nach-leben-dr-fabio-lesjak-tv-webcast/
CATEGORIES:Astronomie,Exoplaneet
END:VEVENT
BEGIN:VEVENT
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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