[astro-ph.EP] Binary stars are common and have the potential to host habitable planets, which may reside in more complex habitable zones as compared to planets orbiting single stars.
binary star
![CH Ind timing and inference. Top: the six differential nodes 𝐷 from equation (1); subtracting primary and secondary O–C values removes their common ephemeris or LTTE trend and isolates the first-order apsidal signal. Bottom: Monte Carlo posteriors for the displayed 0.08-dex common log 𝑘2 systematic; horizontal segments show central 68 per cent intervals.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Stellar-Tidal.png?resize=1200%2C718&ssl=1)
Posted inStellar Cartography
Stellar Tidal Systematics In Apsidal-motion Searches For Circumbinary Planets: CH Ind And SW CMa
[astro-ph.EP] Thornton et al. (2026) reported 27 non-transiting circumbinary-planet candidates from excess apsidal motion in TESS eclipsing-binary timings. The classical stellar contribution is sensitive to target-specific radii, apsidal constants k2, […]
Posted inUncategorized
NASA’s Backyard Worlds: Binaries Project
Some stars have planets. Others are orbited by brown dwarfs, balls of gas too massive to be planets, but too low-mass to be stars. Astronomers love these brown dwarf-star pairs […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release, Stellar Cartography
Tatooine-Class Planet Discovered Orbiting Two Suns
There’s so little we know about circumbinary planets – planets that orbit two stars instead of one – that they can feel like the stuff of fantasy.
Posted inExoplanets, -moons, -comets, Status Report, Stellar Cartography
Planetary Architectures of Kepler Compact Multis with Binary Star Companions
Planets in binary-star systems exhibit demographic differences compared to planets in single-star systems.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
A Century of Radial Velocity and Astrometric Monitoring of 70 Oph AB: New PFS Data and Constraints on Planetary Companions
At a distance of 5.1 pc, the 70 Oph AB binary star system is one of the most favorable targets for future direct imaging and astrometry missions surveying mature, terrestrial […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gaia Mission, Habitable Zones, Imaging & Spectroscopy, Status Report
Predicting Gaia Astrometry’s Ability To Constrain The Populations Of Circumbinary Planets
The coming data releases of Gaia are expected to result in an upheaval of exoplanet science, in particular for long period giant planets (0.2MJ≤M≤25MJ). One class of exoplanets which Gaia […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Stellar And Orbital Characterization Of Three Low Mass M Dwarf Binary Stars With Dynamical Spectroscopy From The Habitable Zone Planet Finder
Contrast curves and reconstructed images from the NESSI speckle imager for a: LSPM 0515+5911, b: NLTT 45468, and c: NLTT 43564. Neither LSPM 0515+5911 nor NLTT 43564 show companions within […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Two Warm Earth-sized Exoplanets And An Earth-sized Candidate In The M5V-M6V Binary System TOI-2267
We report the discovery of two “warm” exoplanets orbiting a very tight pair of small, cool stars called TOI-2267.
Posted inAstrogeology, Exoplanets, -moons, -comets, Mapping, Geodesy, Cartography, Bathymetry, Press Release, Water/Hycean Worlds & Oceanography
Tidally Driven Inertial Waves Enhance Eccentricity Damping And Spin Evolution In Planets And Stars
Tidal interactions influence the orbital motions of binary star systems and extrasolar planets alike.