![Occurrence density for 5.02–7.96 R⊕ (left) and its two radius intervals, 5.02–6.32 (centre) and 6.32–7.96 R⊕ (right). Histograms show posterior medians, with error bars spanning the central 68% credible intervals. Grey shading marks the adopted 2.83–5.66 d ridge interval (Sect. 2.1). Curves show the highest-likelihood sampled profiles (Sect. 2.3). -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/11/The-Neptunian.png?resize=1200%2C716&ssl=1)
[astro-ph.EP] The Neptunian desert and savanna are separated by a ridge, an overdensity at orbital periods of approximately 3-6 d identified with Kepler.
TESS
![The habitable-zone correction at a glance. Each symbol is a TOI placed at a distance from the centre that scales with its insolation relative to the conservative habitable zone of its host (green ring; hotter planets inside, colder outside); symbol size scales with planet radius. Left: positions from the catalogue periods, which place 28 duo-transits in the conservative habitable zone. Right: positions from the periods of this work. Of the 28, nine are resolved and only two remain in the habitable zone, both giants (TOI-4600 c and TOI-1894.01); the 19 unresolved objects, drawn with opacity proportional to their probability of lying in the habitable zone, are expected to contribute 0.0–0.1. Two planets enter the habitable zone: TOI-6478 b, a duo-transit catalogued outside it, and TOI-2298 b, a mono-transit with no catalogue period. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/11/Are-habitable.png?resize=1200%2C720&ssl=1)
Posted inHabitable Zones
Are Habitable-zone TESS Objects of Interest really there? Period Resolution From The Full Archive
[astro-ph.EP]. TESS Objects of Interest (TOIs) seen as single or duo transits carry a catalogue period that is undefined or equal to the separation of the two events, and their […]
Posted inReports, Roadmaps, & Plans
NASA ROSES-25 Amendment 80: D.3 AGIGO: Swift, Fermi, & TESS Observatories Second Opportunities in ROSES-25
The Neil Gehrels Observatory, Fermi Gamma-ray Space Observatory, and the Transiting Exoplanet Survey Satellite (TESS) General Investigator programs solicit proposals for basic research relevant to the respective missions. On or […]
![Sky positions of the TESS M&M sample (shown in a full-sky Mollweide projection), with number of single-sector TESS light curves through Year 6 as colorbar. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/The-Occurrence.png?resize=1200%2C717&ssl=1)
Posted inEuropa
The Occurrence of Circumbinary Planets Around TESS M-dwarf Eclipsing Binaries
[astro-ph.EP] We present the first determination of the occurrence of transiting circumbinary planets (CBPs) in TESS data. Since tight binaries represent a constrained environment relative to single stars, CBPs contribute […]
![Activity-age relationship for solar-type stars from Pezzotti et al. (2026). HD 219134 is denoted by the green square. Kepler LEGACY data from Pezzotti et al. (2026) are shown as cyan dots, Booth et al. (2017) data are indicated by salmon pentagons, and the Sun is shown by a black circled dot. The black lines indicate the linear fit from Booth et al. (2017) (dashed line) and Pezzotti et al. (2026) (dotted line). -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Detailed.png?resize=1200%2C718&ssl=1)
Posted inStellar Cartography
Detailed Study of HD 219134: A Benchmark K-dwarf With A Compact Planetary System
[astro-ph.EP] Space missions such as CoRoT, Kepler, and TESS have transformed asteroseismology and its synergies with exoplanet science.
Posted inExoplanets, -moons, -comets
SOPHIE And TESS Characterization Of Fourteen TESS Objects Of Interest: Nine Planetary Systems And Five Low-mass Stellar Companions
[astro-ph.EP] We present fourteen TESS Objects of Interest (TOIs) from the SOPHIE-TESS follow-up program. Combining TESS photometry, SOPHIE radial velocities (RVs), ground-based photometry, and high-resolution imaging, we establish the nature […]
Posted inExoplanets, -moons, -comets
More Than One Thousand TESS Planets
[NASA Exoplanet Archive] This week’s 70 new planets have unlocked a new exoplanet milestone: 1,000 planets have been discovered with data from NASA’s Transiting Exoplanet Survey Satellite (TESS)! The new […]
![Stability map of the TOI-2211 system in the (Ωc , Ic) plane for the outer planet candidate TOI-2211.02. All other orbital parameters were fixed to the nominal solution from Table A.4. The colour scale shows the adopted stability indicator, with blue regions corresponding to stable configurations and red regions to unstable configurations. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Searching-for.png?resize=1200%2C719&ssl=1)
Posted inWater/Hycean Worlds & Oceanography
Searching For Hot Water World Candidates With CHEOPS: II. A Low-density Super-Earth Orbiting The K Dwarf TOI-2211
[astro-ph.EP] Small exoplanets on close-in orbits are exposed to high levels of stellar irradiation, which can effectively remove low-mass primordial H/He envelopes through atmospheric escape.
![In top panels transits of TOI1408 b (left) and c (right) are shown along with their best fitting models (computed for one of likelihood maxima). In panels below the corresponding binned residuals and their uncertainties are plotted. Notice that there are a few occurrences when planets b and c transits partly overlapped with each other; in such a case all transit curves are plotted in the same graph. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/TOI-1408.png?resize=1200%2C720&ssl=1)
Posted inExoplanets, -moons, -comets
TOI-1408: The Limb Darkening Models, Photometric And Doppler Noises, And The Exoplanetary System
[astro-ph.EP] We perform a self-consistent analysis of Doppler and photometric TESS and ground-based transit observations available for TOI-1408, known to host a system with two planets orbiting near 2:1 mean-motion […]
![D.2: Transit signals recovery analysis in the TESS light curve of TOI-210. TOI-210 b is shown in gold at its period of 9.01 days. Candidate planets at 2.15 and 3.76 days tentatively detected in the NIRPS RVs are indicated as lower limits, with arrows extending from minimum (iron density) to realistic (Earth density) radii based on their minimum masses. The expected transit depths fall within the TESS sensitivity, suggesting that if these RV signals are planets, they are unlikely to be transiting. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/A-temperate.png?resize=1200%2C713&ssl=1)
Posted inExoplanets, -moons, -comets
A Temperate Sub-Neptune Transiting The M4 Dwarf TOI-210 Identified By NIRPS And TESS — Uncovering Hidden M-dwarf Planetary Systems In The Near-infrared
[astro-ph.EP] Super-Earths and sub-Neptunes dominate the exoplanet population, yet their compositions, formation mechanisms, and capability of retaining atmospheres remain poorly understood. M-type stars offer a unique opportunity to investigate these […]