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View Full Version : Astronomers have no definition for "moon," either



ToSeek
2003-Apr-01, 05:11 PM
What is a Moon? (http://www.space.com/scienceastronomy/moon_definition_040103.html)

Sounds as if they need to make up their minds about a few things.

beskeptical
2003-Apr-02, 08:55 AM
We had this discussion a while back about what was a meteoroid vs a moon vs a planet. I wonder which distinctions really matter:

size...composition....location (IE orbit)

Seems to me that a lot of time is wasted discussing whether Pluto is a moon or a planet. I haven't heard why it matters? Perhaps someone can enlighten me so I can quit :roll: over this matter.

David Hall
2003-Apr-02, 01:17 PM
Seems to me like we're about to reach a crisis point in definitions, there are so many debates going on. What's a moon, what's a planet, what's a brown dwarf, what's a KPO? I think someone's going to have to sit down soon and make some hard decisions on these topics.

Of course, the vernacular doesn't always have to follow the scientific terminology.

kilopi
2003-Apr-02, 01:25 PM
Seems to me that a lot of time is wasted discussing whether Pluto is a moon or a planet. I haven't heard why it matters? Perhaps someone can enlighten me so I can quit :roll: over this matter.
Ask Brian Marsden (http://www.badastronomy.com/phpBB/viewtopic.php?p=4801&highlight=marsden#4801). :)

O yeh, it's planet or KBO.

Dan Izzo
2003-Apr-02, 11:34 PM
Oh we have weird definitions for everything haha, like metals (i like the astronomy definition EVERYTHING is a metal if it aint Hydrogen or helium...so much easier)