and they're off

petosiris

Banned
I am sorry but the Moon is not a planet

planet (n.)
late Old English planete, from Old French planete (Modern French planète), from Late Latin planeta, from Greek planetes, from (asteres) planetai "wandering (stars)," from planasthai "to wander," a word of uncertain etymology.

Perhaps from a nasalized form of PIE root *pele- (2) "flat; to spread," on the notion of "spread out," "but the semantics are highly problematic," according to Beekes, who notes the similarity of meaning to Greek plazein "to make devious, repel, dissuade from the right path, bewilder," but adds, "it is hard to think of a formal connection."

So called because they have apparent motion, unlike the "fixed" stars. Originally including also the moon and sun; modern scientific sense of "world that orbits a star" is from 1630s. - https://www.etymonline.com/word/planet :smile:
 

david starling

Well-known member
I am sorry but the Moon is not a planet

Some are on the fence regarding the word "planet", between the entirely Geocentrically oriented, ancient Greek definition, "wanderer" (through the easily visible heavens), which the Moon certainly is; and, the modern-day astronomical definition, which is Heliocentrically oriented, and removes the Moon and Sun from the "planetary" category while including the Earth itself, and "the other naturally formed, spherical bodies of various sizes, in stable orbit around the Sun, which may require a telescope for viewing from the vantage point of the Earth ".
 
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JUPITERASC

Well-known member
Some are on the fence regarding the word "planet", between the
entirely Geocentrically oriented, ancient Greek definition, "wanderer"
(through the easily visible heavens), which the Moon certainly is;
and, the modern-day astronomical definition, which is
Heliocentrically oriented, and
removes the Moon and Sun from the "planetary" category
while including the Earth itself, and
"the other naturally formed, spherical bodies of various sizes
in stable orbit around the Sun, which may
require a telescope for viewing".
Picky, picky, picky! :lol:
Quite :smile:
 

petosiris

Banned
Some are on the fence regarding the word "planet", between the entirely Geocentrically oriented, ancient Greek definition, "wanderer" (through the easily visible heavens), which the Moon certainly is; and, the modern-day astronomical definition, which is Heliocentrically oriented, and removes the Moon and Sun from the "planetary" category while including the Earth itself, and "the other naturally formed, spherical bodies of various sizes, in stable orbit around the Sun, which may require a telescope for viewing from the vantage point of the Earth ".

Tycho and Morin were geoheliocentrists, a model that is mathematically identical to heliocentrism. You can have Saturn, Jupiter, Mars, Venus and Mercury wandering around the Sun wandering around the Earth along with the Moon. :smile:
 

david starling

Well-known member

Not really being picky. In modern-day parlance, the Earth is a "planet" which rotates on its axis and orbits the Sun, which is our nearest "star", while the Moon is a satellite of the planet Earth.

The ANCIENT term "planet", can include the Moon and Sun, excludes the Earth, and holds the Earth stationary while the Heavens rotate around it.

It's worth clarification for those unfamiliar with the ancient terminology.
 

Opal

Premium Member
Entranceways, gates, crossroads.
Daggers, torches, keys

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