the.com/ecliptic

the imaginary highway the sun walks while Earth quietly does all the driving

means The apparent path the sun traces across the sky over a year, which is really the plane of Earth's orbit projected onto the celestial sphere.

from From Greek 'ekleiptikos,' meaning 'of an eclipse,' via Latin 'eclipticus.' The link is logical: eclipses only happen when the moon crosses this very line, so astronomers named the sun's path after the dramatic events that occur along it. The Greek root 'ekleipein' means 'to fail' or 'to leave out' — the sun, briefly, going missing.

named for
eclipses only happen when moon crosses it
tilt
angled 23.4 degrees from Earth's equator
zodiac road
all constellations of the zodiac line it
planet lane
planets cluster near it across the sky
ancient maps
Babylonians tracked it thousands of years ago
for instance

sun's apparent path — the plane in which earth orbits the sun, tilted 23.5° to earth's equator

zodiac constellations — 13 constellations along the ecliptic plane visible from earth during the year

lunar nodes — moon's orbit intersects the ecliptic at two points, determining eclipse seasons

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