数十年来，科学家普遍认为太阳系有九大行星，但随着一颗比冥王星更大、更远的天体的发现，使得冥王星大行星地位的争论愈演愈烈。一是由于其发现的过程是基于一个错误的理论；二是由于当初将其质量估算错了，误将其纳入到了大行星的行列。因此在国际天文学联合会大会上，是否要给冥王星“正名”成为了大...
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...
1. Why is Pluto called a dwarf planet? Because it orbits the sun Because it is mostly round in shape Because it is small and doesn't clear its orbit of frozen junk Because it is far from the sun 2. What newly discovered dwarf planet led to Pluto's reclassification as a dwarf plane...
And I get it a lot. I was expecting that a few years after the International Astronomical Union's controversial decision, the debate would have settled down and people would finally accept it. But no, it's still a sore point for many people - Pluto is not a planet (let that sink in...
It needs to have enough gravity to pull itself into a spherical shape –Pluto…check It needs to have “cleared the neighborhood” of its orbit –Uh oh. Here’s the rule breaker. According to this, Pluto is not a planet. What does “cleared its neighborhood” mean? As planets form, th...
004. Why is Pluto not a Planet anymore 352024-10 3 003. How were the Pyramids built 222024-10 4 002. What if you fell into a Black Hole 412024-10 5 001. Why are there 7 Days in a Week 512024-09 6 09. Why are Prime Numbers so Weird 452024-09 7 08. Exponents in Math - Nega...
battered craters and signs of liquid flowing upon its surface all point to a world that underwent massive geological change since its formation. On this basis alone, people like Stern have said, Pluto should be considered a planet since it is a dynamic place, a place that is not so static...
Since 2006, Pluto, once the ninth planet in our Solar System is not classified as a planet. Here's why.
"SciShow Space" Why Is Pluto Not a Planet? (TV Episode 2014) - Trivia on IMDb: Cameos, Mistakes, Spoilers and more...
9. Why Pluto is not a Planet 10. The search for life in the galaxy Part II . Galaxies 11. The interstellar medium 12. Our milky way 13. The Universe of galaxies 14. The expansion of the Universe 15. The early Universe 16. Quasars and Supermassive black holes Part III ...