Recently, many Earth-sized planets have been discovered around stars other than the Sun
that might possess appropriate conditions for life. The development of theoretical methods …

Icy moons with subsurface oceans of liquid water rank among the most promising
astrobiological targets in our Solar System. In this work, we assess the feasibility of …

Current research indicates that (sub) surface ocean worlds essentially devoid of subaerial
landmasses (eg, continents) are common in the Milky Way and that these worlds could host …

The emergence of life from nonlife, or abiogenesis, remains a fundamental question in
scientific inquiry. In this article, we investigate the probability of the origin of life (per …

Active galactic nuclei (AGNs) emit substantial fluxes of high-energy electromagnetic
radiation, and have therefore attracted some recent attention for their negative impact on …

The probability that life spontaneously emerges in a suitable environment (abiogenesis) is
one of the major unknowns in astrobiology. Assessing its value is impeded by the lack of an …

We present a new investigation of the habitability of the Milky Way bulge, that expands
previous studies on the Galactic Habitable Zone. We discuss existing knowledge on the …

It is well known that active galactic nuclei (AGNs) are accompanied by winds and outflows,
some of which may reach weakly relativistic speeds of about 10 per cent the speed of light …

It has recently been suggested in this journal by Benford that" Lurkers" in the form of
interstellar exploration probes could be present in the solar system. Similarly, extraterrestrial …

We show that the total habitable volume in the atmospheres of cool brown dwarfs with
effective temperatures of∼ 250–350 K is possibly larger by 2 orders of magnitude than that …