Habitability is a widely used word in the geoscience, planetary science, and astrobiology
literature, but what does it mean? In this review on habitability, we define it as the ability of …

The habitable zone (HZ) is the circular region around a star (s) where standing bodies of
water could exist on the surface of a rocky planet. Space missions employ the HZ to select …

The prerequisites and ingredients for life seem to be abundantly available in the Universe.
However, the Universe does not seem to be teeming with life. The most common …

We report discovery of the lowest mass ratio exoplanet to be found by the microlensing
method in the light curve of the event OGLE 2016–BLG–1195. This planet revealed itself as …

In Lammer et al.(2024), we defined Earth-like habitats (EHs) as rocky exoplanets within the
habitable zone of complex life (HZCL) on which Earth-like N2-O2-dominated atmospheres …

We study the prospects for life on planets with subsurface oceans, and find that a wide range
of planets can exist in diverse habitats with ice envelopes of moderate thickness. We …

The subsurface 'deep biosphere'represents one-tenth to one-third of Earth's total global
present-day biomass. The rest is dominated by land plants, a relatively recent development …

The discovery that most of the prokaryotic diversity and biomass on Earth resides in the
deep subsurface, calls for an improved definition of habitability, which should consider the …

The galactic habitable zone is defined as the region with sufficient abundance of heavy
elements to form planetary systems in which Earth-like planets could be born and might be …

Environmental conditions have changed in the past of our planet but were not hostile
enough to extinguish life. In the future, an aged Earth and a more luminous Sun may lead to …