Observations over the past few decades have found that planets are common around nearby stars in our Galaxy, but little is known about planets that formed outside the Milky Way.
HARPS-N
![[LEFT] GJ 536 b and c in context. The upper panel shows the masses of known planets, for masses below 100 M⊕, and periods shorter than 1000 days, with the planets of the system of GJ 536 highlighted, and the solar system planets as reference. The middle panel shows the same, but as a function of insolation. The lower panel shows the contrast in reflected light of low-mass planets orbiting bright stars (mV < 12), compared to their angular separation to their parent star. The dotted vertical lines indicate the limits in which ANDES wil be able to observe (Palle et al. 2025). The red symbols for the planets of GJ 536 show the potential range of contrasts. The green squares show the position of the ANDES golden sample. [RIGHT] Parameters of the planets of the system of GJ 536, using the adopted (circular) model. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/09/A-Second-Lowmass-Planet.png?resize=1200%2C719&ssl=1)
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
A Second Low-mass Planet Orbiting The Nearby M-dwarf GJ 536
GJ 536 is a low-mass star, located 10 pc away from the Sun, that hosts a low-mass planet orbiting with a period of 8.71 days.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
TOI-1438: A Rare System With Two Short-period Sub-Neptunes And A Tentative Long-period Jupiter-like Planet Orbiting A K0V star
We present the detection and characterisation of the TOI-1438 multi-planet system discovered by TESS.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
The HD 60779 Planetary System: A Transiting Sub-Neptune On A 30-day Orbit And A More Massive Outer World
We present the discovery of the planetary system orbiting the bright (V = 7.2), nearby (35 pc), Sun-like star HD 60779, which has a mass of 1.050 +/- 0.044 solar […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Discovery Of A Multi-planetary System Orbiting The Aged Sun-like Star HD 224018
In 2016, Kepler/K2 detected a system of two sub-Neptunes transiting the star HD 224018, one of them showing a mono-transit event.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Venus
The Mass Of The Exo-Venus Gliese 12 b, As Revealed By HARPS-N, ESPRESSO, And CARMENES
Small temperate planets are prime targets for exoplanet studies due to their possible similarities with the rocky planets in the Solar System.
Posted inAriel Mission, Astronomy & Telescopes, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Ten Aligned Orbits: Planet Migration in the Era of JWST and Ariel
Understanding the diverse formation and migration pathways that shape exoplanetary systems requires characterizing both their atmospheric properties and their orbital dynamics.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
Cold Jupiters And Small Planets: A Search For Correlations With The Largest Exoplanet Samples
Finding out whether there is any correlation between the presence of short-period small planets (SPs) with P≲100 d (a≲0.4 AU) and 1<Mp<20 M⊕ and that of outer cold Jupiters (CJs) […]
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Two Hot sub-Neptunes On A Close-in, eccentric orbit (TOI-5800 b) and a farther-out, circular orbit (TOI-5817 b)
Neptune-sized exoplanets are key targets for atmospheric studies, yet their formation and evolution remain poorly understood due to their diverse characteristics and limited sample size.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
HADES RV Programme With HARPS-N At TNG. XVI. A super-Earth In The Habitable Zone Of The GJ 3998 Multi-planet System
The low masses of M dwarfs create attractive opportunities for exoplanet radial-velocity (RV) detections. These stars, however, exhibit strong stellar activity that may attenuate or mimic planetary signals.