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Habitable Zone

All articles tagged with #habitable zone

Earth-sized exoplanet candidate HD 137010 b hints at habitable potential, awaiting confirmation
science20 days ago

Earth-sized exoplanet candidate HD 137010 b hints at habitable potential, awaiting confirmation

Astronomers using Kepler/K2 found HD 137010 b, an Earth-sized planet candidate around a bright star about 146 light-years away; the single observed transit hints at a year-long orbit in or near the habitable zone, but confirmation requires additional observations, such as radial-velocity measurements, with future facilities like NASA’s Habitable Worlds Observatory to determine its mass and atmosphere.

via BBC Sky at Night Magazine|
#exoplanet#habitable-zone#hd137010b
Astronomers map 45 rocky exoplanets as prime targets in the search for habitable worlds
science2 months ago

Astronomers map 45 rocky exoplanets as prime targets in the search for habitable worlds

Researchers using Gaia data and the NASA Exoplanet Archive identify 45 rocky exoplanets in the habitable zone (plus 24 near-edge worlds) that could sustain Earth-like conditions, spotlighting planets such as Proxima Centauri b and TRAPPIST-1 d–g. The list should guide observations with JWST, the Roman Space Telescope, ELT, LIFE and other missions to study atmospheres, test habitability limits, and refine the definition of the habitable zone.

via The Royal Astronomical Society|
#earth-like#exoplanets#gaia
Nearby Calm Star GJ 887 Hosts a Potential Life-Supporting World
space2 months ago

Nearby Calm Star GJ 887 Hosts a Potential Life-Supporting World

Nearby star GJ 887, only 10.7 light-years away, is unusually quiet and hosts GJ 887 d, a super-Earth with at least 6.1 Earth masses in its habitable zone, on a 50.7-day orbit; detected via radial velocity, its calm activity makes habitability prospects more favorable, though atmospheric characterization is challenging since it does not transit, requiring future telescopes like Habitable Worlds Observatory to probe its atmosphere.

via The Daily Galaxy|
#exoplanet#gj-887#gj-887-d
Earth-sized planet in a 355-day orbit emerges as top life-search candidate
science2 months ago

Earth-sized planet in a 355-day orbit emerges as top life-search candidate

Astronomers have identified HD 137010 b, an Earth-sized world orbiting a nearby K-dwarf in about 355 days. Discovered from a single transit and located 146 light-years away, it sits near the star’s habitable zone and offers a prime opportunity for atmospheric follow-up, though confirmation requires another transit or radial-velocity measurements. Its brightness and proximity make it an especially attractive target for future missions like ESA’s PLATO, potentially guiding the search for life beyond Earth.

via Earth.com|
#earth-size#exoplanets#habitable-zone
Habitable Zone Reimagined: Water Might Thrive Beyond Old Boundaries
astronomy2 months ago

Habitable Zone Reimagined: Water Might Thrive Beyond Old Boundaries

A new study argues the habitable zone is not a rigid boundary. For tidally locked exoplanets around M- and K-dwarfs, heat from the day side can be transported to the night side, allowing liquid water to persist there, and even very cold worlds could harbor subsurface water beneath thick ice. This broadened view aligns with JWST findings of water in warm, close-in exoplanets and expands the range of environments considered potentially life-friendly.

via SciTechDaily|
#astronomy#exoplanets#habitable-zone
Nearby Earth-Sized World HD 137010 b Sparks Habitability Debate
space3 months 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
space3 months 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
Ice-Cold Earth-Sized Exoplanet in Habitable Zone Sparks Debate
science3 months ago

Ice-Cold Earth-Sized Exoplanet in Habitable Zone Sparks Debate

Astronomers identify HD-137010 b, an Earth-sized exoplanet about 1.2 times Earth’s mass in a 355-day orbit around a cool K-dwarf star (HD-137010). It may lie just inside its star’s habitable zone and receives less than a third of the energy Earth gets, suggesting surface temperatures around -68 to -85 °C. The planet has only a single observed transit from Kepler, so confirmation requires multiple transits and follow-up with future observatories (e.g., PLATO). A moderately CO2-rich atmosphere could allow liquid water, though a snowball climate is possible. The system could host additional planets, hinting at a solar-system-like architecture, and this discovery shows temperate, Earth-sized worlds around Sun-like stars can be detected via single transits; but further observations are needed to confirm HD-137010 b’s status.

via ScienceAlert|
#astronomy#exoplanets#habitable-zone
Distant 'cold Earth' candidate HD 137010b teeters on the edge of its star's habitable zone
space3 months 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
science3 months 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
space3 months 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
science3 months 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