Since 2006, Pluto, once the ninth planet in our Solar System is not classified as a planet. Here's why.
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PlutoSpace explorationNeptuneAstronomersSunEarthMoonSolar systemsTo qualify, the astronomers decided, an object must be in orbit around the sun (so, for instance, Earth's moon does not count, despite being considerably bigger than Pluto).Economist...
When Pluto was “demoted” from a planet to a dwarf planet back in 2006, it was a sore subject for many. Then, in 2015, a spaceship gave us our first-ever close-up of Pluto, and everything we knew changed! Read more about why Pluto is no longer a planet and how it got its nam...
Size of Pluto (lower left) in comparison to Moon and Earth.(Image credit: Tom.Reding, CC BY-SA) A planetary conundrum Researchers had to ask themselves these questions: If Pluto was a planet, then did that mean Eris was one as well? What about all those other icy objects out in the...
Leonard David
Pluto's orbit around the Sun is extremely eccentric, meaning that at times it is closer than Neptune and at times it is some four billion miles out. Pluto is very small, much smaller than Earth, meaning that it was not discovered until 1930....
What Pluto is and why it is called what it is called What was discovered that led to Pluto being demoted as a planet Details of what the surface of Pluto is like Skills Practiced Reading comprehension - make sure you draw the most important facts from the lesson, such as what Plut...
Most people my age and older likely grew up learning that Pluto was a planet their whole lives. In elementary we were always taught that Pluto was the ninth, smallest, and farthest planet in our solar system. It seemed odd when the planet was reclassified because you had been taught someth...
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