PLuto. No longer a planet?

[elvanbowman]

A bit out there but really is it neccessary to keep creating sub catagories with our perception of our here and now.:confused:

For years we have all been taught that we have nine planets in our solar system and now because some astrominerical geek wants credit as a professor we sub catagorise an inanement planet as a sub catagory.:rolleyes:

Lets face it, its still big, round, has its own moon -Charon- and hangs about in our system. A planets a planet. :cool:

If we let the people who make the rules start discriminating at this level, one must ask where does it stop?

Really who cares, leave it as it is.;)

Anyhow check out these pics and make up your own mind.
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289

cheers:)

[Hannah]

pretty cool pics!!!

Really gotta say though that if you are gonna have an issue with people changing the structure of the solar system then you gotta really be pissed with the constant changes in the sub-atomic level!!! ;)

[OldDog]

Anyone seen mars.:confused:

[STRINGWALKER]

Pluto...wasn't that Mickey Mouse's dog geez i shoulda paid more attention.
But your right....there's too many nit pickers changing stuff!!!

[coach]

Anyone seen mars.:confused: Nah that too is not a planet since they Nuked it !
:D :D

[dbjac]

The problem is, astronomers are finding more and more pluto-like bodies.
So if you call Pluto a planet, then you have to call these planets too. The result will be that we wont have 9 planets, we'll have 500000000000000000 (slight exaggeration for dramatic effect.)

You have to draw the line somewhere.

[elvanbowman]

So this is the point of the post. How many planets do we have in our system? Is it 9,or 8 with two halve planets, or a SH#T load as dbjac sugests.
Where is the line defined and then consider how many reces of humans do we represent?:confused:

If it looks like a duck, quacks like a duck, walks and swims like a duck, and tastes like a duck then its a duck!

Shooting for the stars gets pretty damn hard with all these planets, half planets, planetoids and dwarf planets in the way!

[OldDog]

The problem is, astronomers are finding more and more pluto-like bodies.
So if you call Pluto a planet, then you have to call these planets too. The result will be that we wont have 9 planets, we'll have 500000000000000000 (slight exaggeration for dramatic effect.)

You have to draw the line somewhere.
and whats wrong with 500000000000000000000000000000000 planets.:confused:

[Dave Shannon]

If it looks like a duck, quacks like a duck, walks and swims like a duck, and tastes like a duck then its a duck!



Depends on which Chinese restaurant you dine at! :)

[Marcus]

Yeah duck is great.
Benifit of having a chinese wife is that when her family visits they buy us duck.

[Brocky]

Good to see that this is archery related. Then again it may change the wind which would change the trees moving which would change conditions at archery fields.

[elvanbowman]

All points of consideration. Damn you must be good:D

[Death Damsel]

Good to see that this is archery related. Then again it may change the wind which would change the trees moving which would change conditions at archery fields.

So are you thinking that now that Pluto is no longer a planet, there are only 8 planets to affect the wind so we will no longer have any wind at archery tournaments?????

[frommy]

A distraught caller to Sydney ABC radio this arvo reported that her young son, on hearing the report, removed Pluto from the solar system mobile hanging in his bedroom, and now it is lopsided. :( Serious stuff.

[andrewf87]

A distraught caller to Sydney ABC radio this arvo reported that her young son, on hearing the report, removed Pluto from the solar system mobile hanging in his bedroom, and now it is lopsided. :( Serious stuff.

Shattered ! It seems removing pluto could cause an infinite number of problems ;)

[CMB50]

since it hasn't been mentioned yet....


When are they going to declare Uranus a moon?


:rolleyes:

[andrewf87]

I never even knew it was considered a moon

[Mike13]

since it hasn't been mentioned yet....


When are they going to declare Uranus a moon?


:rolleyes:
Damn that actually made me smile.:lol:

I agree with Marcus - ducks are cool.

[CMB50]

Damn that actually made me smile.:lol:



That nearly makes you as lame as me.....nearly! :rofl:

[recurve boy]

pretty cool pics!!!

Really gotta say though that if you are gonna have an issue with people changing the structure of the solar system then you gotta really be pissed with the constant changes in the sub-atomic level!!! ;)

Nothing is ever changed at the sub atomic level. We realise we were wrong and correct ourselves. Unfortunate side effect of research. ;)

It's the same thing with planets. We realised our former classifications were dumb and now we change it. One day our new classifications may turn out to be dumb still and we'll change it again.

Science FTW!

[Hannah]

Nothing is ever changed at the sub atomic level. We realise we were wrong and correct ourselves. Unfortunate side effect of research. ;)

It's the same thing with planets. We realised our former classifications were dumb and now we change it. One day our new classifications may turn out to be dumb still and we'll change it again.

Science FTW!

a) doesn't this just prove that even scientists are looking to prove their own theory otherwise they would have already come up with the correct answer;
b) when are we gonna realise that there really are no planets just as much as there is no spoon????
:-D

[CMB50]

i don't care about the planets or the spoon, but i will have both the red and the blue pills thanks!

:silly:

[Hannah]

i don't care about the planets or the spoon, but i will have both the red and the blue pills thanks!

:silly:

Now that would be one messed up conconction ;) You really wouldn't where you were or why you were there or even what the hell you were/n't supposed to be doing...not that you would care 'cause you would be a little confused by the look of a plug in your neck without being able to feel it...hmmm - sounds very similar to sensations one gets on LSD...might be something in that...

[Zoe]

Perhaps discounting Pluto as a planet is just a ploy by liberal teachers to adapt the solar system mnemonic for the Y generation:
My Very Elderley Mother Just Sat Up...Not.

[alexvpaq]

k now we are at 8 planet
but there is always the probability of the planet X
so if the planet X is proven we would be back to 9 and everyone would be happy and hum i never ate duck i wonder what is it tasting like...:rolleyes:

[elvanbowman]

since it hasn't been mentioned yet....


When are they going to declare Uranus a moon?


:rolleyes:

Thats is funny as, very witty indeed.
For those that didnt get it....
309

Because it is so big it would be a full moon!

[katzgrin]

Nothing is ever changed at the sub atomic level. We realise we were wrong and correct ourselves. Unfortunate side effect of research. ;)
Science FTW!
If it quarks like a duck it must be sub atomic.

[recurve boy]

a) doesn't this just prove that even scientists are looking to prove their own theory otherwise they would have already come up with the correct answer;
b) when are we gonna realise that there really are no planets just as much as there is no spoon????
:-D

a) That's why we have more than 1 scientist working on the problem. This levels out the egos. There is also only so much ego before you have to concede you are wrong (at worst, this happens when said scientist is dead).

b) Can I still have a cookie?

[elvanbowman]

If it quarks like a duck it must be sub atomic.


Very good!:cool: BOOM BOOM as Basil Brush would say:cool:

[Brocky]

Basil Brush ? Who the hell is that.

[No eye deer]

Just 2 questions,

1) Where are they going to put Pluto (shed-maybe)?
2) Could they put Planet Hollywood where Pluto was?
3)Do you think it will mess up the next "Age of Aquarius"?

Mark

[elvanbowman]

I think thats three questions there:rolleyes:

[elvanbowman]

Basil Brush ? Who the hell is that.

Fair question,

Channel 2 in the late seventies, although the occassional rerun pops up.

He was a comedian fox puppet, like the BBC version of OZZIE OSTERICH

310
:smile:

[Brocky]

S**t are that old I thought by the standard of your posts you where only 12 (being kind).
As you would say have a nice day.

[STRINGWALKER]

Ever since Pluto was removed my arrows are grouping left......just to re-introduce archery back into it............

[katzgrin]

Ever since Pluto was removed my arrows are grouping left......just to re-introduce archery back into it............
When the moon is in the Seventh House
And Jupiter aligns with Mars
Then peace will guide the planets
And love will steer the stars

Obviously your arrows are not planets or stars. In fact your shooting is not stellar! :wink:

[reversehaven]

heh. they might just end up saying all planets aren't planets and all that aren't planets are.

I say we leave the geeks alone. ^^ the universe is so wide i think we have an infinite number of planets. just that we don't have the means to see/identify/prove them.

thought: if you fire an arrow in space would it reach the end of the universe?

[beetle]

thought: if you fire an arrow in space would it reach the end of the universe?

No.


1) Where are they going to put Pluto (shed-maybe)?
2) Could they put Planet Hollywood where Pluto was?
3)Do you think it will mess up the next "Age of Aquarius"?

1) Eat the pups
2) Hamburgers were good, and with a pup equals a heart attack
3) Age of Aquarius doesn't start until around 2600 AD


Bring back Pluto. :mad:

[paulrb]

thought: if you fire an arrow in space would it reach the end of the universe?

Unlikely, because the universe is expanding so it has a lot of catching up to do

Although depending of the rate of the hubble constant (speed of expansion) the universe will either expand forever or reach a certain point, slow down and then contract again, and end up in a 'big crunch' as opposed to the big bang that started it all.

So your arrow... lets say an indoor X7 cobalt 2314 with 5 inch vanes (like it matters much in space) assuming it is fired from at international space station, will travel out of the solar system - assuming it doesn't get caught in the gravitational field of any stars, planets or moons or whatever we call them, & assuming it doesn't hit anything, should accelerate until is reaches a terminal velocity based on resistance. Which is next to nothing - cosmic radiation, solar wind..... so it is gonna get close to the speed of light and it will head out forever...... fifteen bilion light years to the edge of the universe...

Will it reach the end of the universe... or be picked up my an alien space craft.... more likely end up being sucked into the gravity of a star and burn up.

Still I wanna go into space and have a flight shoot..... although it would be slower than clout getting the results in!!

Cheers Paul an ex-science teacher and bit of a geek, although I don't own any star treck DVDs.... :o :o (just Dr Who)

[Jay.G]

Ha so does that mean from previous astronomical exams you wrote 8 planet instead of 9 you would get the mark or would the people who wrote 9 get a mark off? :confused:??

[Archangel]

assuming it doesn't hit anything, should accelerate until is reaches a terminal velocity based on resistance. Which is next to nothing - cosmic radiation, solar wind..... so it is gonna get close to the speed of light and it will head out forever...... fifteen bilion light years to the edge of the universe...
Sorry, but you're wrong - it won't accelerate. Newton's first law, an object will not accelerate unless an external force is applied to it, and in this case there's not one.
It would continue at more or less constant speed pretty much indefinately, assuming it didn't wander too close to a planet or something else massive enough to pick it up or deflect it.

Cheers Paul an ex-science teacher and bit of a geek, although I don't own any star treck DVDs.... :o :o (just Dr Who)
Nothing wrong with that, I don't own any Star Trek DVD's either. Quite liked the new Dr Who, but Firefly is much better than either.

[alexvpaq]

Ha so does that mean from previous astronomical exams you wrote 8 planet instead of 9 you would get the mark or would the people who wrote 9 get a mark off? :confused:??
Awww my whole life's changing :eek:

[elvanbowman]

Nothing wrong with that, I don't own any Star Trek DVD's either. Quite liked the new Dr Who, but Firefly is much better than either.

I agree totally, Mal Reynolds and Serenity's crew are pretty cool:cool:

[paulrb]

Sorry, but you're wrong - it won't accelerate. Newton's first law, an object will not accelerate unless an external force is applied to it, and in this case there's not one.


One thing you forgot, the arrow is accelerating from 0 m/s on the rest. To maintain acceleration no additional force is required so long as no decelerating force is applied. An arrow on earth keeps accelerating until air resistance begins to slow it down, it hits a target, or falls to the ground, whichever come first.

You are right to consider Newtonian mechanics, and the force is there from the bow on launch. In a zero gravity, zero atmosphere environment it should keep accelerating. Space craft such a the two voyagers have done this, having used planets or our moon's gravity to sling-shot them away. Then they keep accelerating until they drop into orbit around the outer planets, then get another sling-shot.

I am fairly sure I am right on this one. although others may have greater Geek knowledge than I.

cheers, Paul... now where is my sonic screwdriver toy....:eek:

[andrewf87]

This question you guys are pondering really got me thinking and i would tend to agree with Archangel, i doubt it would continue to accelerate as there is no force acting on it. I googled it aswell and found this but i don't know how credible it is.

Question -
If you consider a spaceship, at rest, with no outside forces, ie. gravity of nearby masses, objects hitting the spaceship etc., acting on the spaceship itself, it should not move. This spaceship uses some sort of engine to propel itself. Throughout the entire motion of the spaceship no outside forces are acting on it.

Now to the actual question. The spaceship's engine is turned on, accelerating the spaceship, then turned off again. This would leave the spaceship travelling at some velocity (v1), and since there are no outside forces acting on the spaceship it would never slow down. To my understaning, if the spaceship's engine is turned on again, the spaceship would accelerate further, adding to it's original velocity (v1). Since there are no forces slowing the spaceship down, each time the engine is turned on, it should accelerate the spaceship even further. If this process were to continue, the spaceship should be able to reach speeds approaching the speed of light. Are my assumptions correct, or am I missing something here?
Answer -
Bernhard,
Good question. Yes, when the engine is applies a force by ejecting gasses from its rear, the force acclerates the spacecraft according to the equation
F = ma
where "F" is the force, "a" is the acceleration, and "m" is the mass of the spacecraft. The equation tells us that the larger the force the greater the acceleration, and the larger the mass, the smaller the acceleration.

[frommy]

You are all overlooking the improbability drive theory of space flight. :rolleyes:

[dbjac]

and the trees, dont forget about them.

[paulrb]

This question you guys are pondering really got me thinking and i would tend to agree with Archangel, i doubt it would continue to accelerate as there is no force acting on it. I googled it aswell and found this but i don't know how credible it is.


I think you are right. Although I will check and get back. It makes sense that additional acceleration requires additional force/energy to be added.

Oh, well, I shot crap today...... So I am getting to being humble


Cheers Paul R:(

[recurve boy]

I think you are right. Although I will check and get back. It makes sense that additional acceleration requires additional force/energy to be added.

Yep it's right.
F = ma = md(v)/dt = d(mv)/dt

For those of you who don't get that, you should have paid attention in calculus. :P

[Archangel]

One thing you forgot, the arrow is accelerating from 0 m/s on the rest. To maintain acceleration no additional force is required so long as no decelerating force is applied. An arrow on earth keeps accelerating until air resistance begins to slow it down, it hits a target, or falls to the ground, whichever come first.
They accelerate from 0 up to 70-100 m/s because the limbs are working on them. Once the bow's finished it's power stroke, they start decelerating almost immediately due to wind resistance - obviously that doesn't happen in space, so their acceleration is zero.
Don't confuse the fact that they maintain constant speed with no outside force with them maintaining a constant acceleration :-)

Space craft such a the two voyagers have done this, having used planets or our moon's gravity to sling-shot them away. Then they keep accelerating until they drop into orbit around the outer planets, then get another sling-shot.
Similar thing, they accelerate themselves via a slingshot manouevre, but they don't keep accelerating once they're past the planet.
For example, there're the Pioneer spacecraft; they're out of the solar system somewhere, and are in fact slowing down (http://en.wikipedia.org/wiki/Pioneer_anomaly) very very slightly.

[Archangel]

You are all overlooking the improbability drive theory of space flight. :rolleyes:
Not at all, but you'd need a nice hot cup of tea attached to the bow for that to work ;-)

[Progen]

I'm getting really worried now. :confused: :mad: I'm a Scorpio and it'd just devastate me to know that my whole life had been ruled by a STAR!!!


:mad: :mad: :mad:


:D :D :D

[frommy]

Not at all, but you'd need a nice hot cup of tea attached to the bow for that to work ;-)

And don't forget your towel. :rolleyes:

[Betty-Anne]

or your Babel fish

[elvanbowman]

or your Babel fish

Plus your freindly copy of Hitchikers Guide to the Galaxy ( the one with big letters DONT PANIC emblazened on the front) for those that dont now what a babel fish is:smile:

[alexvpaq]

hey there is a good news report about that on rocketboom maybe it might interest someone http://www.rocketboom.com/vlog/archives/2006/08/rb_06_aug_28.html