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Red Dwarf Star

All articles tagged with #red dwarf star

Rocky exoplanet in habitable zone shows it can hold onto an atmosphere
science1 month ago

Rocky exoplanet in habitable zone shows it can hold onto an atmosphere

Astronomers detected helium escaping from LHS 1140 b, a rocky super‑Earth in the habitable zone of a cool red dwarf about 48 light‑years away, marking the strongest evidence yet of an atmosphere on a rocky world outside our solar system. Using the WINERED spectrograph during a transit, they observed a helium absorption signal for LHS 1140 b (but not for its closer neighbor LHS 1140 c), implying a retained upper atmosphere despite stellar radiation. The finding, published in Science, suggests some rocky planets around red dwarfs can hang onto atmospheres for billions of years, though it does not confirm habitability or the full atmospheric composition; future observations will seek other gases and features like oceans to assess potential habitability.

via Yahoo|
#atmosphere#exoplanet#habitable-zone
Nearby Star System Hosts Five Potentially Habitable Rocky Planets
science1 year ago

Nearby Star System Hosts Five Potentially Habitable Rocky Planets

A nearby red dwarf star, L 98-59, just 35 light-years away, hosts at least five planets, all within the habitable 'Goldilocks' zone, making it a promising target for studying potential life-supporting conditions. The system's diverse planets, including a water-rich world and a temperate fifth planet, have been mapped with high precision using existing data, highlighting its significance for future atmospheric research with the James Webb Space Telescope.

via Earth.com|
#astronomy#exoplanets#habitable-zone
Giant Exoplanet Found Orbiting Tiny Red Star Challenges Space Theories
science1 year ago

Giant Exoplanet Found Orbiting Tiny Red Star Challenges Space Theories

A red dwarf star called TOI-6894, located 238 light-years away, hosts a giant planet despite existing theories suggesting such large planets shouldn't form around such small stars. This discovery challenges current models of planet formation, with further studies planned using the James Webb Space Telescope to understand the planet's atmosphere and origin.

via Space|
#exoplanet#nasa-tess#planet-formation
Giant planet around tiny star defies existing planet formation theories
science1 year ago

Giant planet around tiny star defies existing planet formation theories

Astronomers have discovered a giant planet, TOI-6894b, orbiting a tiny red dwarf star, challenging existing theories of planet formation, as such large planets were thought unlikely to form around such low-mass stars. The planet's unusual characteristics, including its low temperature and potential atmospheric composition, make it a key target for future observations to understand its origin and the processes of planet formation around small stars.

via Phys.org|
#exoplanet#gas-giant#planet-formation
science2 years ago

NASA's TESS Discovers Potentially Habitable Earth-Size Planet 40 Light-Years Away

NASA has discovered a potentially habitable exoplanet named Gliese 12 b, located 40 light years from Earth. This "super Earth" orbits a cool red dwarf star and is similar in size to Earth. Researchers are interested in studying Gliese 12 b to understand if Earth-size planets around cool stars can retain their atmospheres, which is crucial for determining habitability.

via Yahoo! Voices|
#exoplanet#gliese-12-b#habitability
"NASA Discovers Earth-Sized Exoplanet with Potential for Life"
science-and-technology2 years ago

"NASA Discovers Earth-Sized Exoplanet with Potential for Life"

NASA has discovered a potentially habitable exoplanet named Gliese 12 b, located 40 light years from Earth. This "super Earth" orbits a cool red dwarf star and could help researchers understand the habitability of planets across the galaxy. The planet's proximity to its star and the star's characteristics make it an ideal candidate for studying whether Earth-size planets can retain their atmospheres.

via USA TODAY|
#exoplanet#gliese-12-b#habitability
"Newly Discovered Exoplanet with Earth-Like Conditions Found"
science-and-space2 years ago

"Newly Discovered Exoplanet with Earth-Like Conditions Found"

Astronomers have discovered Gliese 12 b, an Earth-sized exoplanet 40 light-years away, which may have a temperature suitable for liquid water. The planet orbits a cool red dwarf star and has an estimated surface temperature of 42°C. Its atmosphere, if present, could provide insights into planetary habitability and the differences between Earth and Venus. Further investigation, including by the James Webb Space Telescope, is needed to determine its atmospheric composition and potential for life.

via Phys.org|
#atmosphere#exoplanet#gliese-12-b