Conversation

Notices

1. Embed this notice
   sergeant@qoto.org's status on Wednesday, 31-Jan-2024 00:29:54 JST sergeant

   • 🎓 Doc Freemo :jpf: 🇳🇱

   @freemo That's new to me.

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 08:58:51 JST 🎓 Doc Freemo :jpf: 🇳🇱

     I dont know who needs to hear this... but Pluto is a planet.

   • Embed this notice
     Louis Ingenthron (louisingenthron@qoto.org)'s status on Tuesday, 30-Jan-2024 09:04:37 JST Louis Ingenthron

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Is Ceres too then?

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 09:06:21 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Louis Ingenthron

     @LouisIngenthron Sure is

   • Embed this notice
     Louis Ingenthron (louisingenthron@qoto.org)'s status on Tuesday, 30-Jan-2024 09:08:15 JST Louis Ingenthron

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo How about Haumea or Titan?

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 09:09:45 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Louis Ingenthron

     @LouisIngenthron Haumea yes, Titan no according to current defitions, yes historically. Historically moons were called secondary planets.

   • Embed this notice
     cobratbq - cranky-by-design (cobratbq@mastodon.social)'s status on Tuesday, 30-Jan-2024 09:10:15 JST cobratbq - cranky-by-design

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo nope, it's not. Sorry to burst your planet.

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 09:10:15 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • cobratbq - cranky-by-design

     @cobratbq I mean it literally and scientists agree :)

   • Embed this notice
     Louis Ingenthron (louisingenthron@qoto.org)'s status on Tuesday, 30-Jan-2024 09:10:18 JST Louis Ingenthron

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Are smaller comets and asteroids planets?

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 09:12:22 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Louis Ingenthron

     @LouisIngenthron It would have to have a nearly round shape, orbit the sun. smaller objects arent usually nearly round, so usually not.

   • Embed this notice
     Louis Ingenthron (louisingenthron@qoto.org)'s status on Tuesday, 30-Jan-2024 09:13:48 JST Louis Ingenthron

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Haumea is pretty far from round too; it's an ellipsoid.

     Okay, two more:

     Is the sun a planet?

     Is a hypothetical body the size and mass of earth, but not orbiting any star (i.e. a "rogue" body) a planet?

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 09:16:13 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Louis Ingenthron

     @LouisIngenthron I dont make the rules. Haumea is considered a planet by scientists so they must feel it is sufficiently round.

     the sun doesnt orbit itself, so its not a planet.

     The proper name for a "planet" without a star is a "isolated planetary-mass object" .. it is not a planet no.

   • Embed this notice
     Louis Ingenthron (louisingenthron@qoto.org)'s status on Tuesday, 30-Jan-2024 09:19:30 JST Louis Ingenthron

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Okay, I thought I was done, but that raises a new question: Is Alpha Centauri C, aka "Proxima Centauri", a planet?

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 09:20:42 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Louis Ingenthron

     @LouisIngenthron No, it doesnt orbit itself, also its a star (as sufficient mass to have fusion.

   • Embed this notice
     Louis Ingenthron (louisingenthron@qoto.org)'s status on Tuesday, 30-Jan-2024 09:21:18 JST Louis Ingenthron

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo No, but the point of the question was that it *does* orbit another star (two actually).

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 09:22:11 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Louis Ingenthron

     @LouisIngenthron ORbiting a star isnt enough, there are specific criteria.

   • Embed this notice
     Louis Ingenthron (louisingenthron@qoto.org)'s status on Tuesday, 30-Jan-2024 09:24:33 JST Louis Ingenthron

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Right, but by those criteria, Pluto is a dwarf planet, which is distinct from a main-class planet.

     But okay, so it sounds like your definition is:
     1) Big enough for geostatic equilibrium
     2) Small enough for no fusion
     3) Orbiting a star

     Correct?

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 09:28:49 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Louis Ingenthron

     @LouisIngenthron I never said what type of planet pluto is. Pluto is a planet. There are several types: Major, minor, dwarf, etc.. those are categories of planets

     My definition? What my definition. I use the official definition of a planet. It must be in orbit around its star, not a star, large enough to be nearly-spherical. These are just the standard definition for a planet.

     A "Major Planet" is a class of planets that have the added criteria of clearing their path around the star with no similar sized or larger objects within itspath. But not being a major planet is not the same as saying something isnt a planet.

   • Embed this notice
     Louis Ingenthron (louisingenthron@qoto.org)'s status on Tuesday, 30-Jan-2024 09:47:47 JST Louis Ingenthron

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Okay, that's where I take issue. The unmodified term "planet" has a very strong connotation, both in scientific and common use, of referring only to major planets, not to the larger category (to the point where Wikipedia doesn't even have a separate article on "major planet"; it just redirects you to "planet"... it does, however, have a separate article on "dwarf planets")

     Personally, I think we should classify them only by size:
     1) Asteroid - not rounded
     2) Barren Planet- round, but not massive enough to hold atmo (pluto, mercury, the moon)
     3) Terrestrial planet- has atmo, but clear surface division between gas & liquid if any (venus, earth, mars, titan)
     4) Gas giant planet- massive enough that atmo smoothly transitions from gas-to-liquid with altitude
     5) Dwarf stars
     6) Mainline stars
     7) Giant stars,
     8) Neutron stars,
     9) Black holes

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 09:54:02 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Louis Ingenthron

     @LouisIngenthron People do tend to assume, improperly, that planet means "major planet". But that seems silly to me.

     I was fine with the old definition really.

     Everything is a planet, you just have primary and secondary planets depending if its a primary or not.

   • Embed this notice
     Louis Ingenthron (louisingenthron@qoto.org)'s status on Tuesday, 30-Jan-2024 10:00:11 JST Louis Ingenthron

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Well, that depends on which "old definition" you mean. Originally, it included the sun and moon. Earth didn't even qualify for the definition for a long time, and for a while, it included at least three asteroids.

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 10:00:47 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Louis Ingenthron

     @LouisIngenthron yup, i mean the one that includes the moon as a planet, a secondary planet.

   • Embed this notice
     sergeant@qoto.org's status on Tuesday, 30-Jan-2024 13:56:30 JST sergeant

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Since when? Has it grown?

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 30-Jan-2024 23:26:55 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     @sergeant Since always, though i think it wasnt for a short period maybe.

   • Embed this notice
     sergeant@qoto.org's status on Wednesday, 31-Jan-2024 00:27:59 JST sergeant

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Astronomists deemed Pluto to small to be labelled as a 'Planet'. That's why they call it a Planetoide since a couple of years.

   • Embed this notice
     sergeant@qoto.org's status on Wednesday, 31-Jan-2024 00:29:25 JST sergeant

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo Astronomists deemed Pluto too small to be labelled as a 'Planet'. That's why they call it a Planetoide since a couple of years.

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Wednesday, 31-Jan-2024 00:30:12 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     @sergeant The term right now is "dwarf planet" thus it is a classification of planet.

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Wednesday, 31-Jan-2024 00:30:47 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     @sergeant YEa I think that was a later change, not sure. But its def. a swarf planet now