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A Planet That Orbits Its Star the Wrong Way

Smivs writes "BBC News is reporting that astronomers have discovered the first planet that orbits in the opposite direction to the spin of its star. Planets form out of the same swirling gas cloud that creates a star, so they are expected to orbit in the same direction that the star rotates. The new planet is thought to have been flung into its 'retrograde' orbit by a close encounter with either another planet or with a passing star. The work has been submitted to the Astrophysical Journal for publication. Co-author Coel Hellier, from Keele University in Staffordshire, UK, said planets with retrograde orbits were thought to be rare. 'With everything [in the star system] swirling around the same way and the star spinning the same way, you have to do quite a lot to it to make it go in the opposite direction.' Professor Hellier said a near-collision was probably responsible for this planet's unusual orbit. 'If you have a near-collision, then you'll have a large gravitational slingshot from that interaction,' he explained. 'This is the likeliest explanation. But it might be possible you can do it by gradually perturbing the orbit through the influence of a second planet. So far, we haven't found any evidence of a second planet there.'"

16 of 257 comments (clear)

  1. Maybe it was Kal-El? by Anonymous Coward · · Score: 3, Funny

    You know, he has this thing about spinning planets the other way around...

  2. Maybe its in the southern hemisphere of that star? by randy+of+the+redwood · · Score: 5, Funny

    Doesn't everything rotate backwards if its from down under?

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  3. which left? by lsdi · · Score: 2, Funny

    British?

    1. Re:which left? by buchner.johannes · · Score: 3, Funny

      Right

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  4. Poor Planet by russlar · · Score: 5, Funny

    All the other planets keep pointing and saying "You're doing it wrong!"

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    1. Re:Poor Planet by Normal+Dan · · Score: 5, Funny

      It's different. Let's destroy it.

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  5. Re:Why do they blame the planet? by davester666 · · Score: 5, Funny

    Sun's don't go both ways. They're all either straight or gay.

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  6. Re:I'm no astrophysicist... by Anonymous Coward · · Score: 5, Funny

    A rouge planet

    What does Mars have to do with this?

  7. Re:Maybe its in the southern hemisphere of that st by JustOK · · Score: 3, Funny

    You mean its an Australian planet, mate?

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  8. Re:"But it might be possible... by Arthur+Grumbine · · Score: 2, Funny

    "...you can do it by gradually perturbing the orbit through the influence of a second planet" claims the article.

    Even if I had a second planet, I could probably figure out waaay more productive things to do with it than piss off the orbit of my first planet. That kind of puerile use of a natural resource on such a massive scale would probably only serve to perpetuate the vicious cycle of interplanetary-domestic-violence that has ruined so many healthy, loving solar systems. On behalf of Solar Family Therapists everywhere I'm ashamed that this Prof. Hellier condones such a flagrant misuse of such a precious resource.

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  9. You are going to Kill Someone...... by jameskojiro · · Score: 4, Funny

    This evokes that scene from "Trains Planes and Automobiles"......

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  10. Is it really a planet? by xaboo · · Score: 2, Funny

    It is probably not a planet. It is a Death Star. Lord Vader is near!

  11. Re:Why do they blame the planet? by BluBrick · · Score: 4, Funny

    Sun's don't go both ways. They're all either straight or gay.

    Maybe, but who's to say it can't be turned? It's orbital ring got invaded by a foreign object. Maybe this particular sun, you know, liked the experience?

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  12. Re:I'm no astrophysicist... by geekgirlandrea · · Score: 4, Funny

    What happens if it goes to plaid, though?

  13. Dumb earthlings.. by Important+Remark · · Score: 2, Funny

    No matter how much proof of intelligence and competence we send, the earthlings just don't get it.

  14. Re:Why do they blame the planet? by Anonymous Coward · · Score: 1, Funny

    Who reversed the polarity of the neutron flow?