[ESA] The new observations provide the most detailed mid-infrared view yet of the highly evolved star IRS 3, which is located just 0.55 light-years from Sagittarius A*, the Milky Way […]
Imaging & Spectroscopy
Posted inPhobos
Infrared-to-visible Albedo Ratio Of Phobos: Comparison With Primitive Asteroids
[astro-ph.EP] Aims. The ratio between infrared and visible albedo, pIR/pV, provides a simple proxy for the spectral slope of asteroid surfaces between the visible and near-infrared wavelength ranges. The aim […]
Posted inMars
Cracks In A Martian Crater’s Ice
[NASA/JPL-Caltech/UA] Many impact craters on Mars were filled with ice in past climates. Sometimes this ice flows or slumps down the crater walls into the center and acquires concentric wrinkles […]
![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 inPress Release
Habitable Worlds Observatory’s Concept and Technology Maturation: Initial Feasibility and Trade Space Exploration
[astro-ph.IM] The Habitable Worlds Observatory is the first telescope ever designed to search for life and will be a powerhouse of discovery across topics in astrophysics.
Posted inAstronomy & Telescopes
First Look at a Time-Series Observation with New NIRISS SOSS Multistripe Subarrays
[STScI] Beginning in Cycle 5, NIRISS SOSS enabled four new “multistripe” subarrays that facilitate faster readouts of the standard SUBSTRIP256 subarray footprint. At their limit, these subarrays enable unsaturated observations […]
![Left: Sensitivity of TESS to transits in the full sample of single-star TOIs. Center: The sensitivity for all binary stars in our sample, with all planets presumed to transit the brighter star. Right: As with the top-center panel, except that all planets are assumed to transit the fainter star. The sensitivity of TESS to small planets around binary hosts is substantially lower than for single-star hosts, especially when the planet transits the secondary star.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/The-sensitivity.png?resize=1200%2C722&ssl=1)
Posted inExoplanets, -moons, -comets
The Sensitivity Of TESS To Transiting Planets In TOIs With Close-in Stellar Companions
[astro-ph.EP] High resolution imaging with optical speckle interferometry has revealed that many transiting exoplanet host stars possess close-in stellar companions.
![TiO absorption variation during 8 years on surface of proxima centauri. Vertical lines depicts regions were used to measure B index. -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Titanium-Oxide.png?resize=1200%2C715&ssl=1)
Posted inProxima Centauri
Titanium Oxide Absorption as a Proxy to Detect Long term Variation and Activity Cycle in Proxima Centauri
[astro-ph.SR] Stellar activity cycles on magnetically active stars can be estimated by molecular absorption bands.
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 […]