Goldilocks zone: Everything you need to know about the habitable sweet spot

[Admin]

The Goldilocks zone or habitable zone is the region around a star where an orbiting planet could host liquid water and, therefore, possibly support life.

Goldilocks zone: Everything you need to know about the habitable sweet spot : Read more

 

[rod]

"One example is the exoplanet TOI 700 d, discovered in 2020"

Interesting Goldilocks zone exoplanet. A variety of reports in the past were presented on this exoplanet.

The first habitable-zone, Earth-sized planet discovered with exoplanet survey spacecraft, https://phys.org/news/2020-10-habitable-zone-earth-sized-planet-exoplanet-survey.html

NASA's planet Hunter completes its primary mission, https://phys.org/news/2020-08-nasa-planet-hunter-primary-mission.html

'The First Habitable Zone Earth-Sized Planet From TESS II: Spitzer Confirms TOI-700 d', https://ui.adsabs.harvard.edu/abs/2020arXiv200100954R/abstract, January 2020. "We present Spitzer 4.5 μ m observations of the transit of TOI-700 d, a habitable zone Earth-sized planet in a multiplanet system transiting a nearby M-dwarf star (TIC 150428135, 2MASS J06282325-6534456). TOI-700 d has a radius of 1.144+0.062−0.061R⊕ and orbits within its host star's conservative habitable zone with a period of 37.42 days ( Teq∼269 K). TOI-700 also hosts two small inner planets (R b = 1.037+0.065−0.064R⊕ & R c = 2.65+0.16−0.15R⊕ ) with periods of 9.98 and 16.05 days, respectively..."

Using these properties listed, http://exoplanet.eu/catalog/toi-700_d/

I calculate, 2.2597 earth masses, mean density, 10.053 g cm^-3, and escape velocity 16.22485 km/s. Is it a truly earth-sized exoplanet in the HZ? Perhaps not. There is no published atmosphere for this exoplanet either,http://research.iac.es/proyecto/exoatmospheres/index.php

 

[rod]

There are a variety of exoplanet reports presented that suggest habitable worlds like our Earth, https://forums.space.com/threads/as...oplanet-only-31-light-years-from-earth.59871/

These habitable exoplanet world reports seem to come and go

 

[ghost1107]

There is a smal typo in the article. In the part about 'How big is the goldilocks zone?', "Mars about 0.5 AU.". It should be 1.5AU instead of 0.5AU.