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 …

Traditionally, heliophysics is characterized as the study of the near-Earth space
environment, where plasmas and neutral gases originating from the Earth, the Sun, and …

ABSTRACT A key first step to constrain the impact of energetic particles in exoplanet
atmospheres is to detect the chemical signature of ionization due to stellar energetic …

In this Letter, we make use of sophisticated 3D numerical simulations to assess the extent of
atmospheric ion and photochemical losses from Mars over time. We demonstrate that the …

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 estimate the relative likelihood of success in the searches for primitive versus intelligent
life on other planets. Taking into account the larger search volume for detectable artificial …

Abstract The Solar Energetic Particle and imaging ultraviolet spectrograph (IUVS)
instruments onboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft …

Energetic particles, such as stellar cosmic rays, produced at a heightened rate by active
stars (like the young Sun) may have been important for the origin of life on Earth and other …

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 …

Planets in close proximity to their parent star, such as those in the habitable zones around M
dwarfs, could be subject to particularly high doses of particle radiation. We have carried out …