[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 […]
Stellar Cartography
Posted inAstrochemistry
Complex Organic Molecules in Protostars with ALMA Spectral Surveys (COMPASS) II. Approach To Data Reduction And Products For Line-rich Broadband (sub)millimeter Spectra
[astro-ph.SR] Studying the chemical composition of the warm gas surrounding embedded solar-type protostars is one of the areas for which the Atacama Large Millimeter/submillimeter Array (ALMA) is particularly well suited.
![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 […]
![Sky map of the Plato benchmark stars in Galactic coordinates. Different symbols indicate benchmark quality samples as defined in the text (Sect. 5.3). Symbol size increases with apparent brightness. -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Plato-benchmark.png?resize=1200%2C719&ssl=1)
Posted inPLATO
Plato Benchmark Stars I. The Initial Benchmark Sample I
[astro-ph.SR] The ESA PLATO mission aims to detect and characterise Earth-size exoplanets orbiting bright, late-type stars using high-precision photometry and asteroseismology.
![Chemical clock relations for planet-hosting solar analogs, showing abundance ratios as a function of stellar age for [Y/Mg], [Y/Al], [Ba/Mg], [Ba/Al], [Sr/Mg], and [Y/(Mg+Al)/2]. Data points are color-coded by metallicity ([Fe/H]). Black lines show best-fit linear relations derived using Deming regression, accounting for uncertainties in both variables, and shaded regions indicate 1σ confidence intervals. All abundance ratios show statistically significant correlations with stellar age. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Planets-Around.png?resize=1200%2C720&ssl=1)
Posted inExoplanets, -moons, -comets
Planets Around Solar Twins/Analogs (PASTA) III: Chemical Clock Relations in Planet-Hosting Solar Analogs
[astro-ph.EP] Context. Abundance ratios between elements synthesized on different nucleosynthetic timescales provide empirical chemical clocks for estimating stellar ages, but robust calibrations require homogeneous samples with precise stellar parameters and […]
![Graphical Abstract -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Space-Journey-Beyond-Earth.jpg?resize=1200%2C720&ssl=1)
Posted inExoplanets, -moons, -comets
Space Journey Beyond Earth: Exploring The Properties Of Exoplanets And Multi-planetary Systems
[astro-ph.EP]. In contrast to the observed exoplanet diversity, planets within many multi-planetary systems exhibit intra-system similarities in their radii, masses, and orbital spacings.
Posted inExoplanets, -moons, -comets
Large Planets Ruled Out After 70 Ophiuchi AB Binary System Search
[University of Michigan] New research led by the University of Michigan is helping set the stage for future observatories to characterize rocky planets outside our solar system, planets that could […]
Posted inExoplanets, -moons, -comets
An Earth-like Planet With Two Suns?
[UC Riverside] A nearby star system with two suns could potentially support an Earth-sized planet in a region where liquid water could exist, according to a new paper examining the […]
![Top-down, to-scale view of the TOI-789 architecture. The four planetary orbits are drawn around the M3 host (center); symbol size scales with planetary radius and symbol color with equilibrium temperature (color bar). The candidate .04 is drawn with a dashed outline. Shaded annular bands mark, from the inside out, the Venus zone (Kane et al. 2014), the temperate region defined by Teq = 273– 400 K, and the inner edge of the Kopparapu et al. (2014) habitable zone. The four planets form a sequence of decreasing insolation that crosses the Venus zone, with the candidate .04 near the inner edge of the habitable zone.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Characterization.png?resize=1200%2C719&ssl=1)
Posted inExoplanets, -moons, -comets
Characterization of the Compact Multi-planet System TOI-789: Validation of Three Terrestrial Planets, Dynamical Characterization, and Detection of a Fourth Temperate Candidate
[astro-ph.EP] We present the validation and dynamical characterization of TOI-789 (TIC 300710077), a compact multi-planet system around an M3 dwarf at 43 pc.
![Wavelength distributions of candidate spectral lines retained at each step of the line-selection procedure. The histograms show the initial linelist (light), lines retained after automated vetting (intermediate), and the final manually vetted sample (dark). The shaded background regions indicate approximate wavelength ranges for the Y, J, H, and K-bands.-- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Elemental.png?resize=1200%2C716&ssl=1)
Posted inStellar Cartography
Elemental Abundances of Cool Stars: A Spectroscopic Framework Applied to Five Planet-Host Stars
[astro-ph.SR] Stellar elemental abundances provide important constraints on the chemical environments from which planets form. M and late-K dwarfs are prime targets for the characterization of small exoplanets, yet their […]