the.com/goldilocks zone
the cosmic sweet spot where it's not too hot, not too cold, just right for liquid water.
means the orbital distance from a star where a planet's temperature allows liquid water to exist on its surface.
from named after the fairy tale girl who rejected porridge too hot and too cold in favor of the one that was just right, the term got adopted by astronomers in the 1970s to describe the habitable band around stars.
also calledcircumstellar habitable zone, the formal name
zone shiftsbigger stars push the zone further out
venus lessontoo close means runaway greenhouse, not paradise
not sufficientbeing in it doesn't guarantee actual life
for instance
earth — sits comfortably inside the sun's zone, obviously
kepler-186f — first earth-sized planet found in another star's zone, 2014
trappist-1e — one of three zone planets orbiting a single dwarf star, 2017
mars — technically edge of the zone, lost its water anyway