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#6680043 Sep 06, 2012 at 05:21 PM
167 Posts

(12 minutes ago) Enaz: /blush
(30 minutes ago) Fearnot: <3 I do. I also think its cute when you talk space *pinches cheek*
(34 minutes ago) Enaz: Yeah wrong area to use. MY BAD. but still you get what I'm saying
(36 minutes ago) Fearnot: But yea, you wanted to say past the Kuiper belt. Even more so when using your examples.
(38 minutes ago) Enaz: Is the* I was just saying a planet could be orbiting that far out and it is possible.
(44 minutes ago) Fearnot: which is what the Oort cloud is, which is 50,000-100,000 AU from the sun. Not...30-70au like the distances you were talking about.
(45 minutes ago) Enaz: Yes the oort cloud I the theorized area where the Halley class comets hail from. I'm just talking distance away oribiting since you said it was the proposed distance of the suns gravity.
(about one hour ago) Fearnot: I think you want to be talking about the Kuiper belt, not Oort.
(about one hour ago) Fearnot: Im going to question if you even know what the Oort cloud is?
(about one hour ago) Enaz: @poll IMO try sinestra for 2 weeks. Who still needs DS really besides Nuv for the pole arm?
(about one hour ago) Enaz: The star HR 8799 has 1 planet that orbits around 70 AU. Although this star 1.5 times the size of our sun. Pluto is 40 AU from the sun for some perspective.
(about one hour ago) Enaz: Gtfo with spelling. It is possible to be beyond that distance and still be orbiting our sun. Oph 11 b an exoplanet orbits nearly 300 AU away and the star is only around 16% to 20% the size of our sun.
(about one hour ago) Fearnot: new poll up
(2 hours ago) Fearnot: so if it was beyond the Oort cloud it wouldn't even be orbiting our would just be....there.
(2 hours ago) Fearnot: The problems with everything you just posted are. 1: its Oort, not Ort. 2: Its still a theory that the cloud even exists. 3: Said cloud is also the proposed cutoff line for the suns gravitational pull.
(2 hours ago) Enaz: But it's gravitational effects on the objects would be detactable. The planet would be so far out that the Sun, still the brightest thing in its sky, would still be the the size of an average star in our sky.
(2 hours ago) Enaz: If a planet is much further out maybe beyond Ort cloud it would receive such a low amount of light it'd be almost impossible to see.
(2 hours ago) Enaz: A 9th Dark planet is possible. I mean have you looked at the images from telescopes of Pluto, Makemake, Eris, or Sedna? There is such low light that they are barley visible.
(10 hours ago) Paracyte: And saying there is an unidentified planet has been the popular explanation for almost as long. Matthew Reilly's 7 wonders anyone?
(10 hours ago) Paracyte: Interesting article but I feel there are a lot more theories to be explored before the default mystery planet. We've known about abnormal orbits of objects in the Kuiper belt for a few years now (decade maybe?)
#6680149 Sep 06, 2012 at 05:52 PM
167 Posts
Just copy/pasted this here because its annoying going through the shoutbox to read comments ;)

Things I think should be pointed out. Like Oph 11 and Oph 11b, the star system is 145 parsecs away and we can detect the planet around it due to what looks be a method of imaging. All planets are radiating light, though some can be hard to see and lost by the "glare" of the parent star. If the planet is large enough(bigger than Jupiter), you can look for it as its own light source.

Now here's the thing about our fun little solar system. We don't have to worry about such things as its "light" being blocked out by the sun, because at some point in the year, we will be between the sun and a potential hidden planet. So that removes the "glare" issue.

One of the more common methods of planet hunting would be the gravitational effects that they cause on other objects, usually their parent star. Just as the star exerts a gravitational force upon all the objects in its range, each one of those objects also exerts a gravitational force on the star. So the easy way to find planets is to look for this gravitational effect(The star wiggles!)

Now as for talking about asteroid belts, they are primarily failed planets. For the belt between Mars and Jupiter, unfortunately they couldn't form a planet because Jupiter is a school bully and bastard and simply didn't let it happen.

Now we got the Kuiper Belt which is a nice repository that resembles an asteroid belt(though most objects in it appear to be crystallized gases, which is to be expected due to the nature of things). Just doing a quick read over things, it would suggest that the Kuiper Belt is essentially the leftover garbage after all the planets formed, and it was not itself capable of forming a planet(And in some cases, other objects such as the fun loving Neptune stealing a member of the belt and calling it a natural satellite).

Sure it may be possible for there to be a planet out there, but it is highly unlikely that an actual planet is out there(Most likely there are many Pluto-sized objects out there. I'm looking at you Eris). Basically, if there was a gas giant out there, the gravitational effects it would have on the belt would be noticable, plus there would be some hint of it from spectroscopy studies(As I imagine we've made sure to do extensive studies of our own system).

And remember, the last time they found the 10th planet in the solar system, the following year they reclassified what a planet is and downgraded Pluto. Thanks Eris. Thanks a lot for making us lose an official planet ;)
#6680361 Sep 06, 2012 at 06:43 PM · Edited over 5 years ago
77 Posts
I think its possible there could be something else past the Kuiper belt, but I doubt there is.

Semi on or off topic, but for reference incase someone missed it even after all of the talk about Pluto.

A planet is a celestial body that:

1: Orbits the sun.
2: Has cleared its orbit of smaller debris and stuff.
3: Has enough mass to overcome its rigid body forces and be nearly round.

A dwarf planet (read: Pluto) is a celestial body that:

1: Orbits the sun.
2: Has enough mass to overcome its rigid body forced and be nearly round.
3: Has NOT cleared its orbit of debris and stuff.
4: Is not a satellite(read: moon).

Everything else except satellites are small solar system bodies. Like asteroids, commes, etc.

SO! It has to be past the Kuiper belt at least.
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