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The three classifications of a celestial body to be considered a planet are: it must orbit a star, it must have sufficient mass for its self-gravity to overcome rigid body forces and assume a nearly round shape (hydrostatic equilibrium), and it must have cleared its orbital neighborhood of other debris. These criteria help distinguish planets from other types of celestial bodies, such as dwarf planets and asteroids.

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What is the most outer plane in the solar system?

Neptune is the outermost large planet in our solar system. However, the outermost known planet in our system, when including all classifications of planets, is Sedna, a dwarf planet.


Is a dwarf planet the same as a moon?

no. a dwarf planet is a planet that doesnt have the characteristics for being a planet so its counted as a planet, a dwarf planet can have moons, such as Pluto has 3 moons, but a moon cant have a moon, so therefore dwarf planets and moons are diffrent.


How many stellar star classifications are there?

There are seven main stellar classifications, which are O, B, A, F, G, K, and M. These classifications are based on the surface temperature of stars, with O being the hottest and M being the coolest. Each classification is further divided into subclasses denoted by a number from 0 to 9.


Why did Dr. Tyson leave Pluto out of the solar system exhibit?

Dr. Neil deGrasse Tyson left Pluto out of the solar system exhibit at the American Museum of Natural History to reflect its reclassification from a planet to a dwarf planet in 2006. He aimed to emphasize the current scientific consensus and definitions of celestial bodies rather than adhering to outdated classifications. This decision sparked discussions about the nature of planetary status and the criteria used for such classifications.


The size ranking of Venus if 1 is the smallest planet?

Bear in mind that Pluto has been reclassified as a dwarf planet. Venus ranks as planet #3, being larger than Mercury and Mars, but smaller than Earth.