Space/Science — HabitableZone

Space/Science » in reply to My Very Educated Mother Just Served Us Nine Pickled...

re: My Very Educated Mother Just Showed Us New Photo X-rays

The IAU is leaning towards this for planet classification;
A planet is a body that directly orbits a star, is large enough to be round because of self gravity, and is not so large that it triggers nuclear fusion in its interior.

Eliminating small brown dwarfs and minor wanders.

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