- 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 "
- The Nine Planets of The Solar System | Eight Planets Without Pluto
The smallest and fastest planet, Mercury is the closest planet to the Sun and whips around it every 88 Earth days Spinning in the opposite direction to most planets, Venus is the hottest planet, and one of the brightest objects in the sky
- Planet | Definition, 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
- What Is a Planet? | NASA Space Place – NASA Science for Kids
A planet must do three things: it must orbit a star, it must be big enough to have enough gravity to force a spherical shape, and it must be big enough that its gravity cleared away any objects of a similar size near its orbit
- 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
- What is a Planet? | National Geographic Kids
But what exactly is a planet? It seems like an easy question After all, you’re standing on one right now! But the scientific definition was fairly loose until recently The discovery of other
- The Planets Today : A live view of the solar system
The planets today shows you where the planets are now as a live display - a free online orrery In this solar system map you can see the planetary positions from 3000 BCE to 3000 CE, and also see when each planet is in retrograde
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