[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.
Habitable Zones
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.
Posted inPlant Biology
Is A Constitutive Red-shift An Advantage For Oxygenic Photosynthesis Under M Dwarf Starlight? Insights From Acaryochloris Marina sp. str. Moss Beach
[FEMS Microbes] In the next decades, space telescope missions will search for life evidence on exoplanets, focusing on robust biosignatures associated with oxygenic photosynthesis, including atmospheric oxygen accumulation and the […]
![Graphical illustration showing planetary bodies (not to scale) where H2O2 has been detected, the major production pathways of H2O2, and its role in a few examples of prebiotic chemical networks. -- [Fundamental Research]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Hydrogen-peroxide-1.png?resize=1200%2C716&ssl=1)
Posted inBiosignatures & Paleobiology
Hydrogen Peroxide On Mars And Icy Moons: Implications For The Search For Extraterrestrial Signatures Of Prebiotic Chemistry
[Fundamental Research]. Hydrogen peroxide (H2O2) is increasingly recognized as an important molecule in prebiotic chemistry that potentially had a large impact on life’s early evolution.
Posted inExtremeophiles and Extreme Environments
Could Earthquakes Sustain Yellowstone’s Underground Life?
[USGS] When you think of earthquakes, “life-sustaining” might not be the phrase that immediately jumps to mind. If you haven’t experienced the destruction of an earthquake yourself, you’ve certainly seen […]
Posted inMars
The Search for Life and Biosignatures on Mars: A Mars System Science Approach (Atmosphere, Hydrosphere, Cryosphere, Lithosphere, Geologic History)
[Astrobiology (Journal)] The most important quest in Mars exploration is the search for biosignatures. We adopt a Mars System Science approach, calling on information from the atmosphere, hydrosphere, cryosphere, lithosphere, […]
Posted inAstrogeology
Setting The Stage: The Early History Of The Solar System
[astro-ph.EP] This article reviews the early history of our solar system from an astrobiological perspective and presents evidence from meteorites and astronomical observations. The purpose is to trace the formation […]
![PANEL (A): Diagram of the net tidal accelerations acting on the planetary surface (caused by the host star’s gravity field). The planet is represented with a top view (i.e., as seen from above). Accelerations are computed in the reference frame of the planetary center. PANEL (B): Representation of the tidal bulge. The planet is represented with a top view. Planetary spinning (black arrow) is counterclockwise, as is the orbital motion around the star (red arrow). -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Simulation.png?resize=1200%2C575&ssl=1)
Posted inExoplanets, -moons, -comets
Simulation Of The Spin Evolution Of Some Selected Exoplanets And Inferences On Ttheir Climate
[astro-ph.EP] In this work, using the simulator VPLanet, we analyze the spin evolution of some selected exoplanets due to the tidal interaction with their host star.
Posted inAtmospheres, Climate, Weather
Atmospheres As Habitats
[Astrobiology (Journal)]. The potential of planetary atmospheres as habitats is understudied and likely underestimated. Although planetary atmospheres can provide the fundamental physical, chemical, and energetic requirements for life, they also […]