- Planet - Wikipedia
The word planet comes from the Greek πλανήται (planḗtai) 'wanderers' In antiquity, this word referred to the Sun, Moon, and five points of light visible to the naked eye that moved across the background of the stars—namely, Mercury, Venus, Mars, Jupiter, and Saturn
- About the Planets - Science@NASA
A more modern definition can be found in the Merriam-Webster dictionary which defines a planet as "any of the large bodies that revolve around the Sun in the solar system "
- Planet | Definition, Solar System, Characteristics, Facts | Britannica
Planet, broadly, any relatively large natural body that revolves in an orbit around the Sun or around some other star and that is not radiating energy from internal nuclear fusion reactions There are eight planets orbiting the Sun in the solar system
- Planet - National Geographic Society
Discovered in 1930, it was long considered the ninth planet in our solar system But in 2006, the International Astronomical Union revised its definition of a planet Under the new definition, a planet must be massive enough that gravitational forces have cleared its solar orbit of other objects
- The Planets in Our Solar System – A Timeline
Humankind has known about them for thousands of years Mercury, Venus, Mars, Jupiter and Saturn are all visible in the night sky with the unaided eye As such, these planets have been known for thousands of years and there is no one person who can be credited with discovering these planets These planets appear as bright objects that do not shimmer, like stars do
- Planets in Order From the Sun | Pictures, Facts, and Planet Info
The ongoing debate over planet classification persists amidst our expanding knowledge of the universe, which includes the discovery of numerous exoplanets, potentially including habitable ones within the Milky Way Galaxy, raising questions about the applicability of our current definitions
- What Is A Planet? - The Planetary Society
“Planet” is a word used by the ancient Greeks to describe stars, visible to the naked eye, that moved in relation to the fixed, background stars The word "planet" comes from the Greek word "planetes," which means "wanderer," and likely has more ancient origins
- What Is a Planet? - timeanddate. com
There are eight planets In order of distance from the Sun, they are: Mercury, Venus, Mars, Jupiter and Saturn are visible with the naked eye, and have been known throughout human history
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