![Graphical Abstract -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Space-Journey-Beyond-Earth.jpg?resize=1200%2C720&ssl=1)
[astro-ph.EP]. In contrast to the observed exoplanet diversity, planets within many multi-planetary systems exhibit intra-system similarities in their radii, masses, and orbital spacings.
Exoplanets, -moons, -comets
![D.2: Transit signals recovery analysis in the TESS light curve of TOI-210. TOI-210 b is shown in gold at its period of 9.01 days. Candidate planets at 2.15 and 3.76 days tentatively detected in the NIRPS RVs are indicated as lower limits, with arrows extending from minimum (iron density) to realistic (Earth density) radii based on their minimum masses. The expected transit depths fall within the TESS sensitivity, suggesting that if these RV signals are planets, they are unlikely to be transiting. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/A-temperate.png?resize=1200%2C713&ssl=1)
Posted inExoplanets, -moons, -comets
A Temperate Sub-Neptune Transiting The M4 Dwarf TOI-210 Identified By NIRPS And TESS — Uncovering Hidden M-dwarf Planetary Systems In The Near-infrared
[astro-ph.EP] Super-Earths and sub-Neptunes dominate the exoplanet population, yet their compositions, formation mechanisms, and capability of retaining atmospheres remain poorly understood. M-type stars offer a unique opportunity to investigate these […]
Posted inAstrogeology
Our Solar System Chose Fire Over Ice To Build Its First Bodies
[Yale University] When the solar system first took up the task of building solid bodies — such as planets, moons, and protoplanets — it basically had a choice between two […]
Posted inMars
Did Earth And Mars Have Different Origins?
[University of Copenhagen] Four and a half billion years ago, Earth and Mars were born in the rotating cloud of gas and dust that would eventually become our Solar System.
Posted inAstronomy & Telescopes
Roman Space Telescope’s Wide Field Instrument Activated – Coronagraph Checked Out
[NASA] NASA’s Nancy Grace Roman Space Telescope team has successfully activated the Wide Field Instrument, a 300-megapixel infrared camera that will allow scientists to explore wide swaths of the cosmos […]
Posted inExoplanets, -moons, -comets
Large Planets Ruled Out After 70 Ophiuchi AB Binary System Search
[University of Michigan] New research led by the University of Michigan is helping set the stage for future observatories to characterize rocky planets outside our solar system, planets that could […]
Posted inExoplanets, -moons, -comets
The NEID Earth Twin Survey. VI. Discovery Of A Low-Mass Planet Orbiting HD 126053 And RV Signals Near The Rotation Periods Of HD 168009 and HD 10780
[astro-ph.EP] Extreme precision radial velocity (EPRV) spectrographs are making strides in extending the limits of radial velocity exoplanet detection.
Posted inLava / magma ocean / Volcanic Worlds
The First Hubble Detection Of A Secondary Eclipse From A Rocky Exoplanet: The 5.4-hour Planet TOI-2431 b
[astro-ph.EP] We present an HST/WFC3 G141 phase-curve observation of the ultra-short-period rocky planet TOI-2431 b and detect its secondary eclipse in the near infrared.
Posted inExoplanets, -moons, -comets
An Earth-like Planet With Two Suns?
[UC Riverside] A nearby star system with two suns could potentially support an Earth-sized planet in a region where liquid water could exist, according to a new paper examining the […]
Posted inExoplanets, -moons, -comets
Ammonia And An Unexpected Chill Discovered On Distant Giant Planet HATS-6 b
[University of Maryland] Using the James Webb Space Telescope (JWST), a team of astronomers led by the University of Maryland identified water, methane and ammonia in the atmosphere of HATS-6 […]