In the coming years and decades, advanced space-and ground-based observatories will
allow an unprecedented opportunity to probe the atmospheres and surfaces of potentially …

We describe how environmental context can help determine whether oxygen (O2) detected
in extrasolar planetary observations is more likely to have a biological source. Here we …

Methane has been proposed as an exoplanet biosignature. Imminent observations with the
James Webb Space Telescope may enable methane detections on potentially habitable …

We investigate a new class of habitable planets composed of water-rich interiors with
massive oceans underlying H 2-rich atmospheres, referred to here as Hycean worlds. With …

Ground-and space-based planet searches employing radial velocity techniques and transit
photometry have detected thousands of planet-hosting stars in the Milky Way. With so many …

Context. One of the long-term goals of exoplanet science is the atmospheric characterization
of dozens of small exoplanets in order to understand their diversity and search for habitable …

Hyperspectral data (Table 1) is acquired as continuous narrowbands (eg, each band with 1
to 10 nanometer or nm bandwidths) over a range of electromagnetic spectrum (eg, 400 …

The search for life in the Universe is a fundamental problem of astrobiology and modern
science. The current progress in the detection of terrestrial-type exoplanets has opened a …

Alien Ocean immerses readers in worlds being newly explored by marine biologists, worlds
usually out of sight and reach: the deep sea, the microscopic realm, and oceans beyond …

At the dawn of the first discovery of exoplanets orbiting Sun-like stars in the mid-1990s, few
believed that observations of exoplanet atmospheres would ever be possible. After the 2002 …