![Normalized magnetospheric standoff distance rM/rpl as a function of the planetary magnetic field and the total stellar pressure for Modern Earth (left panel) and Early Earth (right panel) across the HZ of the host star. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/The-impact-of.png?resize=1200%2C714&ssl=1)
[astro-ph.EP] We investigate how tidal locking affects the planetary dynamo and the magnetospheres of Earth-like planets orbiting the habitable zones of M dwarfs.
Habitable Zone
Posted inTricorders & Sensors
New UC Riverside Lab Focuses on Cutting Edge Astrobiology Tools
[UC Riverside] The Planetary Geochemistry and Astrobiology Laboratory is led by Assistant Professor Fabian Klenner, a new faculty member in UCR’s Department of Earth and Planetary Sciences. His research focuses […]
Posted inExoplanets, -moons, -comets
Finding Habitable Exoplanets with Binary Relative Astrometry: Planet Detection and Characterization with the Microarcsecond Astrometric Retrieval Algorithm (MARA)
[astro-ph.EP] Binary relative astrometry is a technique to search for rocky planets in the habitable zone of nearby binary stars using 1D relative astrometry at the microarcsecond level.
![HZ and planetary orbits in the GJ 12 system. The extent of the HZ is shown in green, where light green and dark green indicate the CHZ and OHZ, respectively. The solid line shows the orbit with the nominal eccentricity of 0.24, and the dashed lines represent 1σ boundaries (Turner et al. 2026). The scale of the figure is 0.2 AU along each side with a 0.02 AU grid.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/The-Tidal-.png?resize=1200%2C712&ssl=1)
Posted inExoplanets, -moons, -comets
The Tidal Venus Phenomenon: Demographics and Case Studies
[astro-ph.EP] The demographics of terrestrial planets and their orbits reveal a vast diversity in overall planetary energy budgets.
Posted inMagnetic Fields, Electromagnetism, bioelectricity,
Tidal Locking As A Negative Feedback On Earth-like Planetary Dynamos: Consequences For Magnetic Shielding And Habitability
[Astronomy & Astrophysics] We investigate how tidal locking affects the magnetic field generation and magnetospheric protection of Earth-like planets orbiting the habitable zone of M dwarfs.
Posted inHabitable Zones
The Viability of Life in Helium-Dominated Exoplanet Atmospheres
[astro-ph.EP] Helium is the second most abundant element in the Universe, yet helium-dominated atmospheres are rarely considered as environments for life.
Posted inHabitable Zones
Planetary Stability and Long-Term Habitability in Nearby Stellar Binaries: 70 Oph, 36 Oph, γ Leo
[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.
Posted inExoplanets, -moons, -comets
Strict Limits On Helium Absorption From LHS 1140 b From Four JWST NIRISS Transits
[astro-ph.EP] Orbiting in the habitable zone of its host star, the 1.7 R⊕, 5.6 M⊕ planet LHS 1140 b is a target of great interest.
Posted inAstronomy & Telescopes
NASA ROSES-25 Amendment 69: New Opportunity: D.9 Habitable Worlds Observatory Instrument Concept Assessments
[NASA] Habitable Worlds Observatory (HWO) Instrument Concept Assessments (HWO-ICA) program element D.9 of ROSES-25, solicits proposals to support maturation of the HWO mission concept. The objective of HWO-ICA is to […]
![Representative spectral energy distribution fits for four HWO ExEP target stars: HD 2151 (upper left), HD 3651 A (upper right), HD 4813 (lower left), and HD 10700 (lower right). In each panel, the solid curve represents the best-fitting Pickles (1998) template spectrum, and the filled circles show the broadband photometry with associated uncertainties. Photometric error bars are shown in the y-direction, and filter widths in the x-direction. Fractional residuals between the template flux averaged over each bandpass and the literature photometry are shown in the lower sub-panels. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Spectral-Energy.png?resize=1200%2C716&ssl=1)
Posted inAstronomy & Telescopes
Spectral Energy Distribution Analysis For Habitable Worlds Observatory Target Stars
[astro-ph.EP] The Habitable Worlds Observatory (HWO) will directly image and characterize planets potentially similar to Earth orbiting nearby stars.