Results tagged “extrasolar”

Astronomers at the University of Washington have developed a new method of gauging the atmospheric pressure of exoplanets, or worlds beyond the solar system, by looking for a certain type of molecule.

Three new planets classified as habitable-zone super-Earths are amongst eight new planets discovered orbiting nearby red dwarf stars by an international team of astronomers from the UK and Chile.

Although liquid water covers a majority of Earth's surface, scientists are still searching for planets outside of our solar system that contain water.

Photosynthetic life requires sufficient photosynthetically active radiation (PAR) to metabolise. On Earth, plant behaviour, physiology and metabolism are sculpted around the night-day cycle by an endogenous biological circadian clock.

We make a preliminary assessment on the habitability of potential rocky exoplanets around Alpha Centauri B.

With improvements in exoplanet detection techniques, the number of multiple planet systems discovered is increasing, while the detection of potentially habitable Earth-mass planets remains complicated and thus requires new search strategies.

M type stars are good targets in the search for habitable extrasolar planets. Because of their low effective temperatures, the habitable zone of M stars is very close to the star itself.

Earth-scale planets in the classical habitable zone (HZ) are more likely to be habitable if they possess active geophysics.

The status of laboratory spectroscopic data for exoplanet characterisation missions such as EChO is reviewed. For many molecules (eg H2O, CO, CO2, H3+, O2, O3) the data are already available.

Volatiles in Protoplanetary Disks

Volatiles are compounds with low sublimation temperatures, and they make up most of the condensible mass in typical planet-forming environments.

We make a preliminary assessment on the habitability of potential rocky exoplanets around Alpha Centauri B.

Superhabitable Worlds

To be habitable, a world (planet or moon) does not need to be located in the stellar habitable zone (HZ), and worlds in the HZ are not necessarily habitable.

It is now understood that the accretion of terrestrial planets naturally involves giant collisions, the moon-forming impact being a well known example.

During its four-year mission, NASA's Kepler space telescope discovered thousands of "planetary candidates" in our Milky Way galaxy -- the vast majority of which are almost certainly actual planets.

Large terrestrial planets are expected to have muted topography and deep oceans, implying that most super-Earths should be entirely covered in water, so-called waterworlds.

We have developed a comprehensive methodology and an interactive website for calculating the habitable zone (HZ) of multiple star systems.

We have found that Proxima Centauri, the star closest to our Sun, will pass close to a pair of faint background stars in the next few years.

Habitability around F-type Stars

We explore the general astrobiological significance of F-type main-sequence stars with masses between 1.2 and 1.5 Msun.

To date, scientists have confirmed the existence of more than 900 exoplanets circulating outside our solar system.

Organic haze plays a key role in many planetary processes ranging from influencing the radiation budget of an atmosphere to serving as a source of prebiotic molecules on the surface.

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