![(Top row:) Composite images on three dates (Table 1) shown with a common display range from -0.01 to 0.02 adu pixel−1 . (Bottom row:) Same images from the top row contoured from 0.0004 adu pixel−1 in steps of 0.002 adu pixel−1 . Contours are smoothed over 8×8 pixel boxes. Yellow arrows show the projected antisolar direction while white arrows show the projected negative heliocentric velocity vector, from Table 1. The two directions are overlapping in the 2023 data. A 1′′ scale is common to all panels.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Hubble-Space-.png?resize=1200%2C725&ssl=1)
[astro-ph.EP] Measurements from NASA’s OSIRIS-REx spacecraft revealed (101955) Bennu as a member of the active asteroid class.
Hubble
![The fitted source and lens system positions as measured in the HST F606W (V −band; blue) and F814W (I−band; red) data. The contours show the 68%, 95%, and 99% confidence intervals for the V and I data, respectively. The measured V −band and I−band position of the (brighter) source star is nearly identical. We detect a weak (∼1.3σ) color-dependent centroid shift at the location of the lens system. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/First-Direct.png?resize=1200%2C720&ssl=1)
Posted inExoplanets, -moons, -comets
First Direct Identification Of A Multi-Star Microlens System Hosting A Planet
[astro-ph.EP] Nearly 25 years have passed since gravitational microlensing delivered its first exoplanet discoveries.
Posted inAstrogeology
Trans-Neptunian Objects Remember Their Past
[NASA]. For the first time, scientists used the joint power of NASA’s Hubble and James Webb Space Telescopes to study some of the most far-flung bodies in our solar system, […]
Posted inExoplanets, -moons, -comets
Stellar Flares Rather Than High Tint As Possible Cause For the Missing Methane In Young Exoplanets: The Case Study of V1298-Tau b
[astro-ph.EP] Recent observations of V1298-Tau b, a warm sub-Neptune (R=9.85±0.3R⊕, M=13.1±5.3,M⊕, Teq=670K) orbiting a young (10-30Myr) K star, show depleted methane and surprising abundances of CO2 in its atmosphere.
Posted inExoplanets, -moons, -comets
A Clearer View of HAT-P-1 b: JWST NIRSpec G395H Reveals Water, Carbon Dioxide, and Possibly Hydrogen Sulfide
[astro-ph.EP] As part of JWST’s Exoplanet Grand Tour Survey, we use panchromatic transmission spectroscopy to connect HAT-P-1 b’s previously studied optical and near-infrared atmosphere to the longer-wavelength molecular bands accessible […]
Posted inAtmospheres, Climate, Weather
Atmospheric Retrieval of Combined JWST, HST, and Ground-Based Observations Reveals a Featureless Transmission Spectrum for GJ 1132 b
[astro-ph.EP] We present a panchromatic transmission spectrum of GJ1132b spanning 0.71–5.16 μm, combining published transit observations from Magellan/LDSS3C, HST/WFC3 G141, and JWST/NIRSpec (G395H and G395M).
Posted inAstronomy & Telescopes
Roman Space Telescope: Enabling Images Of Distant Worlds
[Max Planck Institute for Astronomy] The Roman Space Telescope is designed to directly image exoplanets using complex opto-mechanical systems developed by the Max Planck Institute for Astronomy.
Posted inAstrochemistry
Astrochemistry: A Cosmic Recycling System In Action In The Helix Nebula
[Northwestern University] An international team of scientists, including Northwestern University astrophysicists, has captured an unprecedented view of a dying star’s remains in the act of being recycled.
![Mass-radius diagram of known exoplanets together with model curves taken from A. Aguichine et al. (2021) and L. Zeng et al. (2019). Exoplanet data shown with colored dots were taken from the NASA Exoplanet Archive (J. L. Christiansen et al. 2025) on April 2, 2026. The transiting exoplanets in the HD 191939 system are highlighted with larger markers, error bars and a red outline.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/The-SPACE.png?resize=1200%2C714&ssl=1)
Posted inExoplanets, -moons, -comets
The SPACE Program II: No Discernible Spectral Features In The Transmission Spectrum Of The sub-Neptune HD 191939 b Observed With HST/WFC3
[astro-ph.EP] The atmospheres of sub-Neptunes provide a window into their internal structure and history, shedding light on the origin of this common, but enigmatic, class of exoplanets.
Posted inExoplanets, -moons, -comets
First Completed Rocky Worlds Program Observations Open New Era in Exoplanet Studies
[STScI] Scientists leading the astronomy community’s most ambitious effort to study rocky planets outside of our solar system have reached a major milestone.