Enceladus

A Novel Strategy to Seek Bio-signatures at Enceladus and Europa

A Novel Strategy to Seek Bio-signatures at Enceladus and Europa

A laboratory experiment is suggested in which conditions similar to those in the plume ejecta from Enceladus and, perhaps, Europa are established.

Extrasolar Planets

Extrasolar Planets and Their Host Stars

Extrasolar Planets and Their Host Stars

In order to understand the exoplanet, you need to understand its parent star. Astrophysical parameters of extrasolar planets are directly and indirectly dependent on the properties of their respective host stars.

Proxima Centauri b

Reduced Diversity of Life Around Proxima Centauri and TRAPPIST-1

Reduced Diversity of Life Around Proxima Centauri and TRAPPIST-1

The recent discovery of habitable exoplanets around Proxima Centauri and TRAPPIST-1 has attracted much attention due to their potential for hosting life.

Habitable Zones & Global Climate

Exomoon Habitability and Tidal Evolution in Low-Mass Star Systems

Exomoon Habitability and Tidal Evolution in Low-Mass Star Systems

Discoveries of extrasolar planets in the habitable zone (HZ) of their parent star lead to questions about the habitability of massive moons orbiting planets in the HZ. Around low-mass stars, the HZ is much closer to the star than for Sun-like stars.

Extrasolar Planets

Climate diversity on cool planets around cool stars with a versatile 3-D Global Climate Model: the case of TRAPPIST-1 planets

Climate diversity on cool planets around cool stars with a versatile 3-D Global Climate Model: the case of TRAPPIST-1 planets

TRAPPIST-1 planets are invaluable for the study of comparative planetary science outside our Solar System and possibly habitability.

SETI

Laser SETI: First Ever All-Sky All-the-Time Search

Laser SETI: First Ever All-Sky All-the-Time Search

Until now, SETI experiments (Search for Extraterrestrial Intelligence), whether listening for a radio transmitter or searching for a high-powered laser, have assumed that ET is on-the-air all the time, so that wherever the instrument is pointed, the signal will be there. Laser SETI is the first experiment to circumvent this assumption.

Astrochemistry

Hunting Molecules With The Murchison Widefield Array

Hunting Molecules With The Murchison Widefield Array

Astronomers have used an Australian radio telescope to observe molecular signatures from stars, gas and dust in our galaxy, which could lead to the detection of complex molecules that are precursors to life.

Extrasolar Planets

Implications of Tides for Life on Exoplanets

Implications of Tides for Life on Exoplanets

As evident from the nearby examples of Proxima Centauri and TRAPPIST-1, Earth-sized planets in the habitable zone of low-mass stars are common. Here, we focus on such planetary systems and argue that their (oceanic) tides could be more prominent due to stronger tidal forces.

Europa

Pebble Accretion at the Origin of Water in Europa

Pebble Accretion at the Origin of Water in Europa

Despite the fact that the observed gradient in water content among the Galilean satellites is globally consistent with a formation in a circum-Jovian disk on both sides of the snowline, the mechanisms that led to a low water mass fraction in Europa (∼8%) are not yet understood.

Origin & Evolution of Life

Did Life Begin On Land Rather Than In The Sea?

Did Life Begin On Land Rather Than In The Sea?

A paradigm-shifting hypothesis laid out by UC Santa Cruz astrobiologists David Deamer and Bruce Damer could reshape our idea about the origin of life

Astrobiology (general)

The Resilience of Life to Astrophysical Events

The Resilience of Life to Astrophysical Events

Much attention has been given in the literature to the effects of astrophysical events on human and land-based life. However, little has been discussed on the resilience of life itself.

More top stories from July.