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Exoplanet

All articles tagged with #exoplanet

Distant Star Hosts a Nearly Five-Jupiter-Mass Gas Giant in a 180-Day Orbit
astronomy1 day ago

Distant Star Hosts a Nearly Five-Jupiter-Mass Gas Giant in a 180-Day Orbit

Astronomers using NASA's TESS have discovered TIC-65910228 b, a gas giant with about 4.8 Jupiter masses and a radius near 1.08 Jupiter radii, orbiting a metal-rich sun-like star 864 light-years away. The planet completes an ~180.5-day orbit at ~0.7 AU, placing it in the warm-Jupiter regime. Follow-up with NGTS, HARPS, and CORALIE confirmed the transit and radial-velocity signals, while atmospheric studies remain challenging but possible with next-generation telescopes. The system may also host moons or rings, making TIC-65910228 b a compelling target for future exploration.

via The Daily Galaxy|
#astronomy#exomoons#exoplanet
Enaiposha: a Venus-like exoplanet that challenges planetary categories
science6 days ago

Enaiposha: a Venus-like exoplanet that challenges planetary categories

Astronomers using JWST data on Enaiposha (GJ 1214 b), a star‑hopping exoplanet about 47 light-years away, find a thick, hazy atmosphere that makes it more Venus‑like than the previously assumed mini‑Neptune. Early spectral hints point to carbon dioxide, water vapor, and metals, signaling a possible new sub‑type of exoplanet and highlighting how hazes can obscure atmospheric chemistry—though Enaiposha itself is likely too hot to be habitable.

via Earth.com|
#enaiposha#exoplanet#gj-1214-b
Webb Unmasks a New Class: The GJ 1214 b ‘Super Venus’
space11 days ago

Webb Unmasks a New Class: The GJ 1214 b ‘Super Venus’

NASA’s JWST pierced the long-standing haze of exoplanet GJ 1214 b (about 47 light-years away) to detect carbon dioxide and methane in its thick atmosphere, suggesting a high-metallicity, greenhouse-like environment. This challenges the absence of such sub-Neptunes in our solar system and has led to a proposed new class, the “super Venus.” Further observations are needed to confirm the atmospheric structure and chemistry, but the finding marks a milestone in characterizing hazy exoplanets.

via Indian Defence Review|
#exoplanet#gj-1214-b#jwst
Nearby Earth-Sized World HD 137010 b Sparks Habitability Debate
space18 days ago

Nearby Earth-Sized World HD 137010 b Sparks Habitability Debate

Astronomers using Kepler data have identified an Earth-sized exoplanet, HD 137010 b, orbiting a Sun-like–type star about 150 light-years away, with an orbital period of roughly 355 days. The host star is a cooler K-type orange dwarf, meaning the planet may receive less than a third of Earth’s sunlight and could be very cold (below −90°F), though a CO2-rich atmosphere might help trap heat and allow a temperate, potentially watery climate. The candidate was inferred from a single transit in 2017, and follow-up observations (multiple transits) are needed to confirm its habitability and true nature.

via Yahoo|
#exoplanet#habitable-zone#hd-137010-b
Nearby Earth-Sized Exoplanet HD 137010 b Sparks Habitability Debate
space19 days ago

Nearby Earth-Sized Exoplanet HD 137010 b Sparks Habitability Debate

Astronomers analyzing Kepler data have identified HD 137010 b, a rocky, Earth-sized exoplanet orbiting a nearby K-type orange-dwarf star about 150 light-years away, with a 355-day year. Its Earth-like size and orbit make it a compelling habitability candidate, potentially aided by a CO2-rich atmosphere, but the planet’s temperature is expected to be very cold and only a single transit was observed. Follow-up observations—ideally three transits—are needed to confirm its existence and assess habitability, especially given potential tidal locking around cooler stars.

via Futurism|
#exoplanet#habitable-zone#hd-137010-b
Distant 'cold Earth' candidate HD 137010b teeters on the edge of its star's habitable zone
space22 days ago

Distant 'cold Earth' candidate HD 137010b teeters on the edge of its star's habitable zone

Astronomers analyzing Kepler/K2 data have identified a possible rocky exoplanet, HD 137010b, orbiting a K-type dwarf about 146 light-years away. It is expected to be about 1.06 times the diameter of Earth and complete an orbit roughly every 355 days, receiving around 29% of the Sun-like energy Earth gets. This places it at the outer edge of the star’s habitable zone, meaning its surface could be frozen unless it has a thick atmosphere. Only one transit has been observed, so the planet’s existence and exact conditions remain unconfirmed, but future observations by missions such as CHEOPS, TESS, PLATO, and JWST could help determine its reality and assess any atmosphere. The discovery paper notes a 40% chance of being in the conservative HZ, a 51% chance in the optimistic HZ, and a 50/50 chance of not being in the HZ at all.

via Space|
#exoplanet#habitable-zone#hd-137010b
Citizen Scientist Discovers Earth-sized Exoplanet, Paving Way for Next-Gen Telescopes to Study It
science27 days ago

Citizen Scientist Discovers Earth-sized Exoplanet, Paving Way for Next-Gen Telescopes to Study It

A citizen scientist analyzing Kepler data identified an Earth-sized exoplanet, HD 137010b, orbiting a nearby K-dwarf star HD 137010 (about 146 light-years away). The discovery, made by Alexander Venner, was noted for having been missed by automated searches and will guide upcoming telescope campaigns (ESA’s PLATO and Terra Hunting Experiment) to scrutinize a potentially habitable world.

via Good News Network|
#astronomy#citizen-science#exoplanet
Earth-sized exoplanet HD 137010 b hints at a Mars-like world in its star’s habitable zone
space28 days ago

Earth-sized exoplanet HD 137010 b hints at a Mars-like world in its star’s habitable zone

An Earth-sized planet HD 137010 b, about 6% larger than Earth and 146 light-years away, orbits a sun-like star every ~355 days and has roughly a 50% chance of residing in its star's habitable zone. Its surface temperature would be more Mars-like due to the cooler, dimmer star, potentially below −70°C. The planet was detected via a transit captured by NASA's Kepler K2 mission and initially flagged by citizen scientists; confirmation requires additional transits, and its proximity makes it a prime target for future telescopes.

via The Guardian|
#earth-sized#exoplanet#habitable-zone
science29 days ago

Earth-sized exoplanet candidate found near the habitable zone of a sun-like star

An international team led by Australian astronomers identified HD 137010 b, an Earth-sized exoplanet candidate about 146 light-years away that orbits a sun-like star near the outer edge of its habitable zone; the detection came from a single transit in archival Kepler/K2 data and the candidate has an estimated 50% chance of habitability, being roughly 6% larger than Earth.

via Ground News|
#earth-sized#exoplanet#habitable-zone
Webb Telescope Reveals Surprising Atmosphere on Ancient Lava Planet
science1 month ago

Webb Telescope Reveals Surprising Atmosphere on Ancient Lava Planet

NASA's JWST has provided the strongest evidence yet that the ultra-hot super-Earth exoplanet TOI-561 b, despite its extreme conditions, possesses a thick, volatile-rich atmosphere, challenging previous assumptions about small, hot planets losing their atmospheres. The findings suggest this planet has retained its atmosphere, possibly due to a balance between atmospheric escape and magma ocean absorption, opening new questions about planetary evolution in harsh environments.

via SciTechDaily|
#atmosphere#exoplanet#james-webb-space-telescope
NASA's Hubble Reveals Violent Collisions and a Vanishing Planet
science1 month ago

NASA's Hubble Reveals Violent Collisions and a Vanishing Planet

Astronomers observed what they thought was a planet around star Fomalhaut, but it vanished due to a collision between asteroid-sized bodies, creating a debris cloud. A second similar object appeared nearby, indicating violent impacts rather than a new planet, challenging existing models of planetary formation and raising concerns for future exoplanet detection methods.

via The Daily Galaxy|
#dust-cloud#exoplanet#fomalhaut