Biosignatures & Paleobiology: August 2019

The Atmospheric Chemistry Experiment's Fourier Transform Spectrometer on the SCISAT satellite has been measuring infrared transmission spectra of Earth during Solar occultations since 2004.

Two McGill University astronomers have assembled a "fingerprint" for Earth, which could be used to identify a planet beyond our solar system capable of supporting life.

Thanks to the advances in modern instrumentation we have learned about many exoplanets that span a wide range of masses and composition.

Resolving spatially-varying exoplanet features from single-point light curves is essential for determining whether Earth-like worlds harbor geological features and/or climate systems that influence habitability.

Astronomers have uncovered a new way of searching for life in the cosmos. Harsh ultraviolet radiation flares from red suns, once thought to destroy surface life on planets, might help uncover hidden biospheres. Their radiation could trigger a protective glow from life on exoplanets called biofluorescence, according to new Cornell University research.

The diverse methodologies and myriad orthogonal proposals for the best technosignatures to search for in SETI can make it difficult to develop an effective and balanced search strategy, especially from a funding perspective.

In the hunt for life on other worlds, astronomers scour over planets that are light-years away. They need ways to identify life from afar -- but what counts as good evidence?