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...
1269why PlUtoisnota PlanetneildeGraSSetySonHere’s the story of how Pluto lost its planetary status and was demoted to an iceball in the outer solar system. It’s also about my role in this at the Rose Centerfor Earth and Space at the American Museum of Natural History.In building the...
24, 2006, when researchers at the International Astronomical Union (IAU) voted to reclassify Pluto, changing its status from a planet to a dwarf planet — a relegation that was largely seen as a demotion and which continues to have reverberations to this day. Today, the debate about Pluto ...
Q: Why Is a Pluto No Longer a Planet?Byline: Bill Robertson Brian Diskin In recent years astronomers discovered a number of...Robertson, BillNational Science Teachers AssociationScience & Children
But, it is actually even smaller than the Earth’s Moon: it has only one-sixth of its mass and one-third of its volume. But, as explained above, it lost its planet status in 2006 (some researchers still argue against that decision). Today, Pluto is reclassified as a dwarf planet in...
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. Read why Pluto is no longer a planet, how it got its name and more cool facts.
Why isn’t Pluto a planet anymore? And what is a planet anyway? Astrophysicist Jackie Faherty explains! If you’re more of a dinosaur person, check... 其它视频 9:58 How We Could Build a Moon Base TODAY – Space Colonization 1 33 人观看 16:54 How the C-Section Became America’...
For a long time, Pluto was considered to be the 9th and tiniest planet in our solar system. However, after scientists made some new discoveries,...
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Beyond Pluto lies a new solar system frontier. Pluto is just the start. Pluto is the end of the first chapter, and the beginning of the second. John Wenz Writer John Wenz is a Popular Mechanics writer and space obsessive based in Philadelphia. He tweets @johnwenz. ...