Re: A planet in a four-star system
Posted: Wed Oct 17, 2012 5:56 pm
Pluto is SO a planet!Commander McLane wrote:...But it's not a planet anymore.So we're still unique!
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A planet in a four-star system
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Re: A planet in a four-star system
Posted: Wed Oct 17, 2012 10:43 pm
Isn't Pluto smaller than our own moon?Rese249er wrote:Pluto is SO a planet!Commander McLane wrote:...But it's not a planet anymore.
Re: A planet in a four-star system
Posted: Wed Oct 17, 2012 10:54 pm
No. Planetoid. It fails to meet the criteria of having sufficient gravity to pull itself into a sphere. If Pluto got to stay in the planet club, then loads of planetoids since discovered, would have more of a claim than Pluto to planetary status, so they drew a line in the sand and made sure Pluto was on the wrong side of it...Rese249er wrote:Pluto is SO a planet!Commander McLane wrote:...But it's not a planet anymore.
Re: A planet in a four-star system
Posted: Wed Oct 17, 2012 10:58 pm
Gustav Holst knew what he was doing - when they eventually commissioned a Pluto addition to the Planets Suite, it just didn't fit, musically.
Re: A planet in a four-star system
Posted: Wed Oct 17, 2012 11:06 pm
I may be all of 22 years old, but when it comes to Pluto, I'm still old-fashioned.DaddyHoggy wrote:No. Planetoid...
Re: A planet in a four-star system
Posted: Wed Oct 17, 2012 11:27 pm
He's not the best of Disney's creations if I'm honest.Rese249er wrote:I may be all of 22 years old, but when it comes to Pluto, I'm still old-fashioned.DaddyHoggy wrote:No. Planetoid...
Re: A planet in a four-star system
Posted: Thu Oct 18, 2012 12:01 am
Hanna-Barbera however recognized Bluto as a great character.DaddyHoggy wrote:He's not the best of Disney's creations if I'm honest.Rese249er wrote:I may be all of 22 years old, but when it comes to Pluto, I'm still old-fashioned.DaddyHoggy wrote:No. Planetoid...
(My initial thought was to invoke
![[Wikipedia]](/images/wikipediasmall.png){kind=small}
Godwin's Law when I saw Disney, but then I realised that would just be a cheap joke. 
)Re: A planet in a four-star system
Posted: Thu Oct 18, 2012 12:28 am
Which brings to mind Wimpy - I could murder a cheese-burger, at the moment!Tricky wrote:Hanna-Barbera however recognized Bluto as a great character.
Re: A planet in a four-star system
Posted: Thu Oct 18, 2012 6:03 am
And if you could just lend me a dollar, I will gladly repay you Tuesday.El Viejo wrote:Which brings to mind Wimpy - I could murder a cheese-burger, at the moment!Tricky wrote:Hanna-Barbera however recognized Bluto as a great character.
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Re: A planet in a four-star system
Posted: Thu Oct 18, 2012 9:59 am
<chortles> As it happens, I possess an old one-dollar bill that I've had for decades - I'll 'port it to you! <feeds note into the optical drive>DaddyHoggy wrote:And if you could just lend me a dollar, I will gladly repay you Tuesday.
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Re: A planet in a four-star system
Posted: Thu Oct 18, 2012 12:06 pm
Sure it's not over 9000?DaddyHoggy wrote:<Thread derailment as reached 100%>
Re: A planet in a four-star system
Posted: Thu Oct 18, 2012 4:11 pm
May I point out to any noobs here that this isn't likely to be an Oolite feature for quite some time!
Re: A planet in a four-star system
Posted: Fri Oct 19, 2012 7:19 am
Sorry, wrong DH. It's a "Dwarf Planet" and it is large enough to pull it into a sphere. The criteria it fails to be a full blown planet is "(c) has cleared the neighbourhood around its orbit" as there are a lot more object in similar orbits nearby.DaddyHoggy wrote:No. Planetoid. It fails to meet the criteria of having sufficient gravity to pull itself into a sphere. If Pluto got to stay in the planet club, then loads of planetoids since discovered, would have more of a claim than Pluto to planetary status, so they drew a line in the sand and made sure Pluto was on the wrong side of it...Rese249er wrote:Pluto is SO a planet!Commander McLane wrote:...But it's not a planet anymore.
Full definition:
Code: Select all
A planet is a celestial body that
(a) is in orbit around the Sun,
(b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and
(c) has cleared the neighbourhood around its orbit Code: Select all
A celestial body that
(a) is in orbit around the Sun,
(b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape,
(c) has not cleared the neighbourhood around its orbit, and
(d) is not a satellite.Re: A planet in a four-star system
Posted: Fri Oct 19, 2012 7:36 am
[joking]Is SO![/joking]
Re: A planet in a four-star system
Posted: Fri Oct 19, 2012 11:10 am
This may well prove a problem for the New Horizons probe, which is on its way there.PhantorGorth wrote:... has [not] cleared the neighbourhood around its orbit" as there are a lot more object in similar orbits nearby.