Strange New 'Twin' Worlds Found
toomanyairmiles writes "The BBC reports on the the discovery of 'twin worlds' which orbit each other, successfully blurring the line between planets and stars. 'Their existence challenges current theories about the formation of planets and stars.' according to the Journal of Science article which reports their existence. 'The pair belongs to what some astronomers believe is a new class of planet-like objects floating through space; so-called planetary mass objects, or "planemos", which are not bound to stars.'"
However insular we want to be, the universe has all sorts of stuff in it that we would never expect. Sure with CGI, we can 'visit' anything we can imagine.
It's just great that there is more than that out there. Gives me hope for the future.
Rhymes that keep their secrets will unfold behind the clouds.There upon the rainbow is the answer to a neverending story
Orbit each what?! The suspense is killing me!
It's a space station!
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Stars can only 'ignite' when enough mass accumulates. It would make sense that often there would be chunks of smaller mass just floating around until they scoop up enough matter into their gravity well to start fusion.
I think we can just stick to "The twins"...
I'm sorry, but what exactly does this challenge? A planet doesn't need a star to form.
If a nebula is the right size, it may form a planet--and it doesn't care if there's any stars nearby. It is then affected by something's gravity, and goes careening off into space.
Additionally, to make twin planets, you'd need only a nebula that's peanut-shaped, so it collapses into two bodies.
Other extra-solar planets were dicovered when the astronomers saw the doppler shift in their stars. These planets do not orbit stars (as far as I can tell from the article) so there's no light to see them and there isn't a star to see any "shifts". So how were these stars discovered? X-Rays? What?
Anticipating a possible question: no, a previously-unknown population of "planemos" can't be the dark matter astronomers are searching for. First, there were enough of them to account for the huge mass of dark matter (some 95 percent of the mass of the universe), we would have seen a lot more of them by now. "Massive compact halo objects", or basically planetoids, brown dwarfs, neutron stars, etc. have been detected (via gravitational lensing), but they are known not to comprise the majority of dark matter due to such bounds on their total mass. Furthermore, from the effects of dark matter on structure formation in the early universe, the cosmic background radiation, and other factors, it is known that "normal" matter can't account for most of the mass of dark matter, either: most of it needs to be in the form of "weakly interactive massive particles" (sort of analogous to neutrinos, except much heavier).
Isn't it amazing how well the artist's impression clearly and realisticly show that the these objects are separated by "six times the distance between the Sun and Pluto"?
g /_41960898_planemos_203_eso.jpg
http://newsimg.bbc.co.uk/media/images/41960000/jp
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"The pair belongs to what some astronomers believe is a new class of planet-like objects floating through space; so-called planetary mass objects, or "planemos", which are not bound to stars.'"
Once again proving that astronomers should not be naming things while drunk. Here's a handy reminder: "Remember the Planemos!"
Vincent J. Murphy
Spandex Justice
Maybe they're a couple of Fourth Imperium battle planetoids in parking orbit.
Now we just need to figure out how to get over there and hotwire those babies.
Ok so our Solar System is mostly flat. I mean, the orbits of the planets tend to follow the same orbital plane, with a notable exception of course.
The reason the planets orbit in the same plane is the same reason rings around celestial bodies like Saturn eventually fall into a common orbital plane: gravity. As the mass collects there is something like a gyroscopic effect, causing a general influence towards the common plane.
But.. if that's the case, why do we have a planet that doesn't follow the plane? And, also, is it slowly falling into line with the rest? (I think the answer is yes, it is, but I don't know for sure.. at least I think it should be).
Which leads me to ask.. Was Pluto originally extra-solar? Could it have developed in this eccentric orbit if it were originally part of the solar system when it formed? Is it possible that Pluto somehow, amongst the billions of years our system has been around, floated into orbit here for good, from Out There?
And if so, if there are enough of these free-floating masses out there, what kind of percentage of the unobservable 'dark matter' might this account for?
Just a few of my questions,
TLF
I do not respond to cowards. Especially anonymous ones.
if the 'planemos' are not part of any stellar system, how are they visible in an optical telescope? they can't generate light of their own, they can only reflect...
My sig has been answered.
'twin worlds' which orbit each other, successfully blurring the line between planets and stars.
Let me unblur that for you. If it's on fire, it's not a planet.
how exactly does this streach the ideas of how objects are formed in space? These "planemos" were therorized in my highschool astronomy book (and no, im not going to tell you how many years ago that was).
To form a star: Take a whole LOT of hydrogen gas in open space... maybe add a little helium for good measure. Wait for a few million years untill the gravatational pull of the gas concentrates in in the center of the cloud. As the gas condences it gets hotter due to the collisions of the gas molicuels/atoms. If there is enough presure then the temperature will reach the point needed for hydrogen fusion, at which point the new solar wind will stop any more gas from condencing into the new star.
now, if you DONT have enough gas to get the presure high enough to get the temperature high enough, then fusion WONT occur, the gas will all condence into the failed star and.... thats it. The condenced gasses will simply float away from the star forming reagon and voila.... planemos.
not exactly a streach.
"Yes, it's really easy to confuse a ball of rock with a star. I mean, the similarities are so obvious."
In terms of such stars as Ben Affleck, the similarities do start to build up.
Where were you when the voynix came?
Which one is the evil twin?
Thank you , I'll be here all evening!
how long until
"if the 'planemos' are not part of any stellar system, how are they visible in an optical telescope? they can't generate light of their own, they can only reflect..."
It's pretty easy if you duct-tape a Maglite to the side of the telescope, with the light end aimed in the same direction as the telescope sight.
Where were you when the voynix came?
The only way to make space travel and colonization viable is to develop warp drive. Indeed, an obscure Germany scientist has already developed the basic theory supporting warp drive. Slashdot reported on a heavily funded air-force project to build a warp-drive engine based on that theory. Unfortunately, I cannot locate the Slashdot article at the moment.
I dont like the name one bit... they have NOTHING to do with planets... they are stelar objects whos mass is simply to low to get their internal temperature high enough for hydrogen fusion.
IMHO better names would be: stellar dwarfs, non-fusion stars or something along those lines... they arnt planets.
one would expect to find things that didn't quite make it in the universe.
Snakes, on a PLANEMO????
Where were you when the voynix came?
Otherwise we should think about evacuating. Well, evetually.
Did they name the Planet Mass System "planemos" because they didn't want to call it PMS?
" Take a whole LOT of hydrogen gas in open space... maybe add a little helium for good measure"
And then you add this bowl of chopped onions. BAM!!!
Where were you when the voynix came?
No need to get all excited because Galactus phoned in to Magrathea for the two-for-one special. Different toppings on each planemo, no less.
Where were you when the voynix came?
"Just like "Old Maids" in the popcorn one would expect to find things that didn't quite make it in the universe."
Now THIS is getting me to take the global warming threat the the earth REAL seriously!
Where were you when the voynix came?
The first planemo will make a very close approach to Earth. The second will smack right into earth. But by then the spaceships we cobble together with nifty 50's retro-tech will have blasted off with the lucky few colonists to build a new civilization. Too bad with such a small gene pool they'll devolve into slack jawed mouth breathers in a few generations. Looks like the future of reality TV is assured.
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Any Star Wars CCG fan can tell you that Kiffex did this long, long ago.
Informatus Technologicus
PlanemO's are actually God's cereal.
someone grab www.planemos.org quick!
never bring a twinkie to a food fight.
so they found a binary rogue planet system... now theyre just trying to create a new jargonistic name for them so they can be in the history books.. just call a spade a spade already.. "binary rogues"... that's it..
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If there were a ridiculous number of these 'unexpected' objects, that could explain the 'dark matter' problem, right? I mean, we can't see a bunch of rocks out in space, only stars. Perhaps there are way more rocks than burning stars.
Excuse me. Jupiter is a gas giant planet, not a rocky one. The planemos referred to in the article seem to be similar composition. Not quite brown drawf stars..bigger than planets we are familiar with.
And, how do they know it is a twin? We can't resolve two separate points at such a distance, can't we?
17779 eligible voters in a district, 17779 'vote' as one. This is Russia.
Six times the distance from the Sun to Pluto. If you're on one planet you might be lucky to see the tiny dot of the other planet in the night's sky... I don't recall if it said they were orbiting a star (for light) or not. So even the picture is misleading.
the "magical gyroscopic effect" the GP suggested is no more nonsensical than your "magical spiraling mass of dust"
An actual answer involves the fact that the pre-solar mass was likely spinning (not "spiraling") on the same plane the elliptic. The formation of planets occurred on this same plane for obvious reasons, leaving our current system (minus Pluto) of planets with similar planes.
As for the dark matter question, my understanding is that the theory claims that most dark matter is comprised of WIMPs, particles which don't interact in the same way as the "normal" matter which makes up stars and planets.
How about climbing off your high horse and answering the questions, if you can... or don't you get enough of an ego boost giving an answer as opposed to a put-down?
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The idea of wandering sunless planets is old enough at least in fiction. The book "When Worlds Collide" is about a pair of rogue sunless planets which orbit each other entering the solar system and colliding with Earth. It was written in 1932. The movie made in 1951 is not half bad either.
Sometimes my arms bend back.
>[...]to make twin planets, you'd need only a nebula that's peanut-shaped, so it collapses into two bodies.
You got a planet in my peanut-shaped nebula!
Hey - YOU got a planet in my peanut-shaped nebula!
Quick, check and see if Spock has a beard.
- Tash
Yippie! Hybrids!
I have being always fascinated with the stars and new theories, The question is How two planets could be so similar? When would be possible to explore them? If the planemos defy the theories about the creation of the stars, what other theories are out there that support the possibility of the existence of the twin planets?
My first thoughts. But it turns out its just a bunch of planets.
"Binary Rogues... "
Something tells me that the next X Men movie might earn an R rating. Hope Halle stays around!
Where were you when the voynix came?
Please, don't! As someone already mentioned, astrophysicists already call them MACHOs. As opposed to WIMPs, of course, which is another possible explanation for the "missing mass" problem.
Help me out here. . . .
If planet A is circling planet B, then planet B cannot circle Planet A, right?
Can someone explain to me how they can orbit each other at the same time???? Wouldn't it be more correct to say that they are polarized like 2 oppositly charged magnets?
Ok nevermind.
Self proclaimed wannabe geek. You know how it is. Most of us who read this stuff probably fit in that category.
Good. Bad. Which one is the guy with the gun?.
With science, we can trust it enough to build aircraft, computers, (and bombs I guess).
With religion, not many would have faith enough to hope that a god will carry you in the air or in space. And noone is foolish enough to believe that new-moses could go to a mountain and get stone-tablet computers. But religion does give us people crazy enough to use the bombs created by science.
named Chad?
Man, you really need that seminar!
Haldane's law:
Not only is the universe stranger than we imagine, it's stranger than we can imagine.
Strike while the irony is hot! -- The Freethinker
I'm not the least bit surprised by this article. My question would be could these planemos explain at least a portion of the dark matter in the universe?
While it appears they believe these two planet-like objects formed together outside of a proper solar system, stray planets floating through space along are probably not all that rare, particularly smaller single ones. The current thinking in solar system development is that Jupiter+ sized planets sometimes move inward towards their host star as the planets develop. When they do this, planets whose orbits they come near will generally either get flung into the host star or outside of the system completely from the gravity of the Jupiter+ sized planet. Since there appears to be no shortage of solar systems with large planets in close or highly elliptical orbits, it would seem to suggest that quite a few planets get flung from their systems. Unfortunately they'd generally be too small and dark for us to see (unless they happened to pass through our solar system).
Well, religious people often blow up things. They also kill, torture, or commit other atrocities.
But science doesn't work like that. With the scientific method you may find sometimes that you weren't absolutely right, but each step gets you closer to the truth.
so, why can't we just say that this is a pair of brown dwarves?
The question of what to call such very massive substellar object was raised years ago by a science type mag (Omni or Discover or somesuch, I don't recall specifically). Many votes were cast, many suggestions were made, and ALL of them were much better and more intelligible than "Planemo". My personal favorite remains SUMO, for SUbstellar Massive Object or SUper Massive Object. Seems to be just about right for these things.
1.Netcraft confirms:In Soviet Russia all your base welcomes a beowolf cluster of CowboyNeal overlords. 2.? 3.Profit!!1!
You mean Space: 1999 was real? Omigod, WTF! Quick, someone bomb the Russians to keep the moon safe from terrorists.
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Smell that ?
It's the smell of rendering farms heating up at Pixar.
Wanna fight ? Bend over, stick your head up your ass, and fight for air.
Your post is redundant: http://science.slashdot.org/comments.pl?sid=192866 &cid=15835640
Stupidity is like nuclear power, it can be used for good or evil. And you don't want to get any on you.
Ok, I'll put an end to this pointless slash-war. I've updated the sig. Maybe this will be thwart future sig attacks.
When I have a kid, I want to put him in one of those strollers for twins and then run around the mall looking frantic.
Ah but then, what is?
just check which one has the evil bit set.
this is what happens when the moon gets a bulge :/
Most of these objects discovered by doppler shifts which only see heavy and/or fast (close-in) objects. As more powerful techniques and instruments come on line, we may see more solar-sytem-like objects then. And maybe not.
Although it's interesting that we've now been able to observe such a pair of dim objects in this configuration, I see nothing strange about its existence. Astronomers have known about binary (and trinary) star systems for ages, but those were always easy to spot because they're so luminous. Brown dwarfs, on the other hand, are much harder to find, but thanks to modern technology we've found quite a few and astronomers now believe that they are in general quite numerous. So, what's so strange about two brown dwarfs orbiting one another? Nothing, really. It may be the first time we've found a binary system like this, sure -- great! -- but it's not strange at all; that's just an adjective thrown in by the media to spice the story.
I think you meant to go here, but didn't link properly.
g /_41960898_planemos_203_eso.jpg
http://newsimg.bbc.co.uk/media/images/41960000/jp
It's good to know I am not the only person aware of the distionction between average and median.
A slashdotter who didn't build his own computer is like a Jedi who didn't build his own lightsaber.
Scientists did that? Who? I mean, not people who use science, but people whose main objective in life is science itself?
some people are just assholes and like to hurt people, whether they are religious or scientific or whatever
Yeah, well, I suppose you are right. The only difference being that science asserts that one must always question authority and be ready for being questioned, while religions assert that one is right without any need to prove it and anybody who disagrees is a heretic. Assuming someone is an asshole and must choose between science and religion, which way he is most likely to go?