Comments on: No Planet X needed https://behindtheblack.com/behind-the-black/points-of-information/no-planet-x-needed/ Wed, 23 Jan 2019 14:45:40 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Richard M https://behindtheblack.com/behind-the-black/points-of-information/no-planet-x-needed/#comment-1063537 Wed, 23 Jan 2019 14:45:40 +0000 https://behindtheblack.com/?p=55922#comment-1063537 Well, moons (at least those which have reached hydrostatic equilibrium) really just a kind of planet.

If Ganymede were out there in lone orbit around the Sun, it would be called a “planet” – even by the IAU – without a second thought.

]]> By: Phill O https://behindtheblack.com/behind-the-black/points-of-information/no-planet-x-needed/#comment-1063535 Wed, 23 Jan 2019 13:26:08 +0000 https://behindtheblack.com/?p=55922#comment-1063535 I still prefer the terms, terrestrial, gas giants and Plutanoids for the rough classification of planets!

]]> By: wodun https://behindtheblack.com/behind-the-black/points-of-information/no-planet-x-needed/#comment-1063531 Wed, 23 Jan 2019 09:59:28 +0000 https://behindtheblack.com/?p=55922#comment-1063531 It would be horrendous if we reach a day when moons are labeled planets. It is bad enough they demoted Pluto.

]]> By: wayne https://behindtheblack.com/behind-the-black/points-of-information/no-planet-x-needed/#comment-1063526 Wed, 23 Jan 2019 04:03:00 +0000 https://behindtheblack.com/?p=55922#comment-1063526 The Search for Planet X
https://www.amazon.com/Search-Planet-X-Paperback/dp/B000IRWOG8

]]> By: Andi https://behindtheblack.com/behind-the-black/points-of-information/no-planet-x-needed/#comment-1063524 Wed, 23 Jan 2019 03:55:30 +0000 https://behindtheblack.com/?p=55922#comment-1063524 I thought that “Planet X” referred to the original search for further planets after Neptune was discovered, because the action of Neptune couldn’t explain perturbations in the orbit of Uranus. “X” meaning “unknown”

]]> By: BSJ https://behindtheblack.com/behind-the-black/points-of-information/no-planet-x-needed/#comment-1063522 Wed, 23 Jan 2019 01:41:11 +0000 https://behindtheblack.com/?p=55922#comment-1063522 To pick a nit.

Didn’t the term “Planet X” come from when there were nine planets? Not because ‘X’ is cool but, because X is the Roman numeral 10.

The new mystery planet should be, if anything, IX.

Yeah, I’m a Roman numeral nerd…

]]> By: wayne https://behindtheblack.com/behind-the-black/points-of-information/no-planet-x-needed/#comment-1063513 Tue, 22 Jan 2019 16:30:28 +0000 https://behindtheblack.com/?p=55922#comment-1063513 Looney Tunes Duck Dodgers
“Planet X”
https://youtu.be/rh5G6RUgjiM
2:22

]]> By: wayne https://behindtheblack.com/behind-the-black/points-of-information/no-planet-x-needed/#comment-1063511 Tue, 22 Jan 2019 16:22:40 +0000 https://behindtheblack.com/?p=55922#comment-1063511 tangentially related-

nicely done computer simulation

Simulating Solar System Formation
California Academy of Sciences 2016
[excerpt from their Planetarium show]
https://youtu.be/yXq1i3HlumA
4:21

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