![Planets that will be observed with MIRI in transit, in JWST Cycles 1-5. As mentioned in section 5, we see a wide variety of planet sizes and equilibrium temperatures. The currently published planets are shown in black dots, and listed in Table 1 and Figure 1. We have ommitted the white dwarf planet WD 1856 b (Teq = 160K, Rp = 10.2R⊕, cycle 4), as well as the disintergrating planets K2-22 b (see section 2.1) and BD+05 4868 A b (Teq = 1820K, unknown Rp, cycle 4). -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/A-Homogeneous.png?resize=1200%2C720&ssl=1)
[astro-ph.EP] The launch of JWST has enabled unprecedented atmospheric characterization of exoplanets. In particular, the JWST-MIRI instrument in the mid-infrared enables probing of molecular species that are harder to detect […]
astronomy
![The separation of β Pictoris b and β Pictoris c from the star in terms of their Hill sphere. β Pictoris b has a longer orbital period (∼20 yr), with a Hill sphere primary transit at MJD ∼58000 and a Hill sphere radius of 1.1 au. β Pictoris c has a shorter orbital period (∼3.3 yr), with two primary transits at MJD 58195+11 −20 and 59415+8 −8 and a secondary transit at 58707+3 −7 . The § Hill sphere radius is approximately 0.3 au. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/The-Hill.png?resize=1200%2C712&ssl=1)
Posted inBeta Pictoris
The Hill Sphere Transits of Beta Pictoris c and The Search for Another 1981-like Event
[astro-ph.EP]. Beta Pictoris is a young and nearby planetary system hosting an edge-on debris disk and at least three gas-giant planets. Their circumplanetary environments could host exomoons and rings, a […]
![Schematic of the flow-map encoder–operator–decoder architecture used to emulate chemical kinetics. The encoder maps the current normalized input state (and global parameters) to a latent space. The latent dynamics operator evolves this latent state using the time step and global parameters, and the decoder reconstructs the predicted future normalized species state. Optional residual connections can be applied in latent space and/or on the normalized model outputs.-- astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Accelerating.png?resize=1200%2C718&ssl=1)
Posted inExoplanets, -moons, -comets
Accelerating Chemical Kinetics For Exoplanet Atmospheres Using Neural Networks
[astro-ph.EP] Observations increasingly reveal the coupled radiative, chemical, and dynamical processes that shape exoplanet atmospheres. Interpreting these atmospheres requires models that can capture this complexity.
![Sky maps with locations of star clusters with exoplanets and candidate objects. The upper graph is centred on the Galactic centre, while the lower one is centred on the Galactic Anticenter.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Exoplanets-in.png?resize=1200%2C719&ssl=1)
Posted inExoplanets, -moons, -comets
Exoplanets In Star Clusters
[astro-ph.EP] The field of exoplanetary research is rapidly evolving, thanks to TESS and Kepler/K2. With the latest data release, Gaia DR3, Gaia has transformed the study of star clusters.
Posted inAstronomy & Telescopes
NASA SMD ROSES-25 Amendment 68: New Opportunity: D.8 Habitable Worlds Observatory Precursor Science Investigations [UPDATE 2]
[NASA]. The Habitable Worlds Observatory (HWO) is a large-aperture ultraviolet/visible/near-infrared observatory concept recommended by the National Academies of Science, Engineering, and Medicine decadal survey, “Pathways to Discovery in Astronomy and […]
![Left: SCALES optical diagram. Right: Image of the focal plane coronagraph slide mask holder, with flight optics labeled. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Pre-shipment.png?resize=1200%2C720&ssl=1)
Posted inAstronomy & Telescopes
Pre-shipment Optical Characterization Of The SCALES Instrument
[astro-ph.IM] The Slicer Combined with an Array of Lenslets for Exoplanet Spectroscopy (SCALES) instrument is a 1-5 micron imager and 2-5 micron integral field spectrograph, currently being commissioned on the […]
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 inApps - Games
pyEDITH: The Coronagraphic Exposure Time Calculator For The Habitable Worlds Observatory
[astro-ph.IM] To support the development of next-generation missions for the search and characterization of habitable planets, high-fidelity tools for astrophysical and instrumental noise simulations are needed.
![Bifurcated best-fit solutions. The noisy generated data is shown with gray error bars. The true spectrum of Earth is in black, while the Earth-like solution and thick- -atmosphere solution are shown in blue and orange, respectively. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Impacts.png?resize=1200%2C720&ssl=1)
Posted inExoplanets, -moons, -comets
Impacts Of Correlated Noise On Retrievals Of Exo-Earth Atmospheres
[astro-ph.EP] The Habitable Worlds Observatory (HWO) aims to accomplish high-contrast imaging and spectroscopy of true Earth analogs for the first time. However, high-contrast spectroscopy with HWO may be limited by […]
![Waste-heat temperature–luminosity phase space. Existing midinfrared searches occupy the warm band (orange); cold computational radiators fall in the far-infrared/submillimetre band (green) towards the CMB floor. Grey lines show 345-GHz flux-density contours for a source at 100 pc, from equation (10), which is linear in the fractional waste-heat luminosity 𝑓 on the vertical axis; the figure thus covers partial swarms and complete spheres (𝑓 = 1) alike. Markers indicate a complete 1 L⊙ cold sphere, the level of the archival debris-survey limits (Section 6.1), and the domain of warm mid-infrared searches. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Slysh.png?resize=1200%2C720&ssl=1)
Posted inSETI & Technosignatures
Slysh Haloes: The Waste Heat Of Cold Computing As A Submillimetre Technosignature
[astro-ph.IM] Searches for Dysonian waste heat have operated almost exclusively in the mid-infrared and are therefore sensitive primarily to technology radiating at 100-600K. We argue that mature, computation-dominated civilisations may […]