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New Uranus Moons and Rings Discovered

Patrick Furlong writes "CNN reports that the Hubble Space Telescope has discovered two new moons and two new rings around Uranus. The moons had been imaged by Voyager 2 in 1986 but were not recognized as moons at the time." More from MSNBC, and the official Hubble Site. From the CNN article: "The Hubble images also confirmed the existence of another moon, Perdita, which was first identified in the Voyager 2 pictures but had eluded telescopes ever since. Many moons of Uranus are named after characters in Shakespeare, and these new moons follow suit. Mab is named for Queen Mab, who is the subject of a famous speech by the character Mercutio in 'Romeo and Juliet.'"

32 of 128 comments (clear)

  1. Heh - Futurama by robyannetta · · Score: 5, Funny
    Fry: "Hey, as long as you don't make me smell Uranus." *laughs*

    Leela: "I don't get it."

    Professor: "I'm sorry, Fry, but astronomers renamed Uranus in 2620 to end that stupid joke once and for all."

    Fry: "Oh. What's it called now?"

    Professor: "Urectum. Here, let me locate it for you."

    Fry: "Hehe, no, no, I think I'll just smell around a bit over here."

    --
    - Just my $0.02, take with a grain of salt, your mileage may vary.
    1. Re:Heh - Futurama by geekoid · · Score: 3, Funny

      Troll? Who the hell thought this was a troll?

      Jeez, they should implementing testing for qualifications to moderate.

      It's either funny, or nothing.

      Actually, that's kind of my moto.

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
  2. Gas giants and rings by PIPBoy3000 · · Score: 4, Interesting

    At this point, the question seems to be, do gas giants ever not have rings? They seem to be celestial vacuum cleaners, attracting all sorts of debris. It's a good thing too, as it probably kept the orbital bombardment of Earth to a minimum.

    1. Re:Gas giants and rings by jd · · Score: 5, Informative
      The rings are unstable and constantly evaporating, so only relatively young gas giants OR gas giants in relatively crowded solar systems should have rings. Uranus' inner moons, which are likely shepharding moons, are in unstable orbits and will likely collide in the next million years. If the rings were to survive that long, I doubt they could survive much longer without the inner moons being there.


      Jupiter has thin rings, despite being bombarded a great deal more than Uranus or Saturn, though you'd need to talk to an expert in planetary physics if you have much of a hope of finding out why.


      Of the rocky planets, Earth is the only one I know of that has a (natural) ring. It is extremely thin and usually ignored, but does exist. My guess, based on the theory that the moon is a result of a collision between an original Earth and some planet of comparable size, is that the ring is debris that was launched by the collision but did not congeal into the moon as it now is.


      The multitude of rings of space junk launched by humans is stupid. That which cannot be retrieved for space museum purposes should be swept up and removed, before it becomes impossible to get into space at all.


      Going back to the discoveries - I think it less of a surprise that the discoveries have occured (just think of how many new rings and moons have been discovered around Jupiter and Saturn) than it is a surprise that people haven't found anything before now for Uranus. Its rotation is so strange and its properties so bizare that I would have thought that planetary astronomers would have concentrated extra effort onto it. Discoveries do not come from studying the mundane, they come from studying the exceptions and understanding why and how they have become such.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    2. Re:Gas giants and rings by spleentor · · Score: 2, Informative

      i thought jupiter's rings were caused by io's volcanic activity. if i remember they were constantly falling into the planet to be replaced by debris from fresh eruptions on the moon.

    3. Re:Gas giants and rings by MisterBuggie · · Score: 2, Interesting
      Of the rocky planets, Earth is the only one I know of that has a (natural) ring. It is extremely thin and usually ignored, but does exist. My guess, based on the theory that the moon is a result of a collision between an original Earth and some planet of comparable size, is that the ring is debris that was launched by the collision but did not congeal into the moon as it now is.


      I'm curious, this is the first I've heard of Earth having a ring. The only reference I can find is a hypothesis of a ring having existed in the past. Unless you made an error, could you point me towards some ressources that talk about it?

      Thanks
    4. Re:Gas giants and rings by TrumpetPower! · · Score: 2, Informative

      MisterBuggie wrote:

      I'm curious, this is the first I've heard of Earth having a ring.

      AOL

      And, it would seem we're in good company. NASA hasn't heard of one, either.

      Cheers,

      b&

      --
      All but God can prove this sentence true.
  3. There names are by geekoid · · Score: 4, Funny

    Boil and Pimple.

    Thank you, I'll be here all night!

    --
    The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    1. Re:There names are by Seoulstriker · · Score: 4, Funny

      Thank you, I'll be here all night!

      Indeed you will, it's Friday night afterall.

      --
      I am defenseless. Use your button. Mod me down with all of your hatred.
  4. Mod Parent up by FinchWorld · · Score: 2, Insightful

    How that deserved a troll mod i have no idea, maybe we need a -1 unfunny, but troll ain't the substitute.

    --
    "I may be full of crap about this game, and I may be wrong, and that's fine." -Jack Thompson
    1. Re:Mod Parent up by Spamboi · · Score: 4, Funny

      I've always felt there should be a -1, "Funny" moderation myself...

  5. Hubble? by Anonymous Coward · · Score: 5, Interesting

    So, tell me again why they're getting rid of the Hubble telescope?

  6. That famous speech by AndroidCat · · Score: 4, Informative
    --
    One line blog. I hear that they're called Twitters now.
  7. TV newscasts just got worth watching by cryfreedomlove · · Score: 3, Interesting

    The last time Uranus was in the news I got quite a kick out of watching TV news anchors squirm as they talked about Your Anus.

    1. Re:TV newscasts just got worth watching by EnronHaliburton2004 · · Score: 2, Interesting

      Well, they could just pronounce it UrUnus, which is what most astronomy folks do anyways...

  8. Oh crap.... by Mr.+Cancelled · · Score: 3, Funny

    Rings around Uranus... Moons...
    This all sounds like a Goatse moment if I've ever heard of one

    Mustn't click the wrong link...

  9. Moons by echostorm · · Score: 5, Informative

    Im pretty sure this brings the list to 23?

    * Cordelia - 1986
    * Ophelia - 1986
    * Bianca - 1986
    * Cressida - 1986
    * Desdemona - 1986
    * Juliet - 1986
    * Portia - 1986
    * Rosalind - 1986
    * Belinda - 1986
    * Puck - 1986
    * Titania - 1787
    * Oberon - 1787
    * Ariel - 1851
    * Miranda - 1948
    * Umbriel - ?
    * Caliban
    * Sycorax
    * Prospero
    * Setebos
    * Stephano
    * Perditta - 1986
    * Mab - 2005
    * Cupid - 2005

    Thats a heck of alot of moons!

    1. Re:Moons by bergeron76 · · Score: 2, Funny

      You forgot:

      Donner, Blitzen, et al.

      --
      Don't think that a small group of dedicated individuals can't change the world. It's the only thing that ever has.
    2. Re:Moons by Kusunose · · Score: 3, Informative

      27, according to Wikipedia.
      You missed Francisco, Trinculo, Margaret and Ferdinand. They are found in 2001 and 2003.

  10. Bah Slashdot Editors by Greyfox · · Score: 2, Interesting
    No sense of what makes a good headline. My submission for this was "Hubble Finds Dark Rings around Uranus" but noooo....

    Oh well anyway, I think it's pretty neat that after having peered into the darkest depths of space, Hubble can still find interesting things to look at here in our own backyard! You'd think the telescope would have demonstrated its merits enough to not have to constantly exist under threat of having its funding cut and it being deorbited...

    --

    I'm trying to teach myself to set people on fire with my mind... Is it hot in here?

  11. Wow... by StoatBringer · · Score: 3, Funny

    The Hubble must have a pretty powerful flash to light the outer planets up so well.

    --
    Cress, cress, lovely lovely cress
  12. Oblig Chem Joke by eosp · · Score: 2, Funny

    I know I'll get modded offtopic, but: Q) What's the difference between miazole and urazole? A) The size of the ring.

  13. Re:Bad choice of names by sarastro_us · · Score: 2, Informative

    Perdita is named after a character from Shakespeare, just like all the moons of Uranus.

  14. Re:Who made that name up? by EnronHaliburton2004 · · Score: 4, Informative

    Nope! Uranus was discovered by William Herschel.

    Uranus was an early Greek God of the Sky, Son of Gaia. The word predates the english use of "Your Anus" by a couple thousand years.

  15. Uranus is so big... by bk4u · · Score: 3, Funny

    they're still discovering moons around it.

    --
    Remember kids, with great power comes great opportunity to abuse that power
  16. It's in postscript, so be warned! by jd · · Score: 3, Informative
    The reference discusses systems in general, but does include a brief section on the Earth's rings. The text of interest is at the start of page 4. Ignoring the stuff about the IRAS and COBE satellites, which imaged it, we have the following comment:


    The Earth's ring corresponds to Case I in Figure 1, a circular ring with a gap at the location of the planet. However, the Earth's low mass means that it traps relatively few particles; the ring represents a density enhancement of only a few percent. This effect would scarcely appear in an image of the solar system seen from afar.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    1. Re:It's in postscript, so be warned! by Keith+McClary · · Score: 3, Insightful

      This seems to refer to a ring centred on the Sun lying in the Earth's orbit.

  17. Precious by BorgCopyeditor · · Score: 2, Funny

    Quote from the CNN article: "No one thought this region of Uranus was very interesting."

    --
    Shop as usual. And avoid panic buying.
  18. Don't bother to de-orbit space junk by Anonymous Coward · · Score: 2, Informative

    "The multitude of rings of space junk launched by humans is stupid. That which cannot be retrieved for space museum purposes should be swept up and removed, before it becomes impossible to get into space at all."

    Putting weight into a stable orbit is expensive. Let's take the Athena II launch vehicle as an example. To get 1,896 kilograms to low earth orbit it costs about $25,000,000. Which works out to approximately $13,000/kg. You want to de-orbit the payload, the final motor stage, and any other random detritus necessary to get up to orbit (like, for instance, any leftover propellant in a liquid system)? That takes weight, over 10 kg worth without a doubt. And weight is money.

    If your payload is a communications satellite, then that kind of parasitic weight reduces the lifetime of the satellite and the number of transmitters it can carry. The companies that are putting things up in orbit aren't in it to be good citizens. They're in it to make a profit, which isn't necessarily easy in the space industry. Space is a common resource, and the potential negative impact of having more space junk to the companies building, launching, or operating these satellites is tiny compared to the cost of putting that parasitic weight on there. It's the tragedy of the commons (google it.)

    Besides, space isn't empty. Anything in orbit is constantly experiencing collisions with the solar wind and random gaseous atoms. As it slows down, it gets closer and closer to the atmosphere, eventually de-orbiting on its own. Remember the US space station?

  19. Perdita has an appropriate name... by bitrex · · Score: 2, Interesting

    given that it had been imaged by Voyager 2 but had eluded telescopses since then. I believe "Perdita" means "Lost" in Latin...

  20. Re:What do the Starship Enterprise... by Brad1138 · · Score: 2, Funny

    If your going to bring up this ancient joke, at least tell it right:

    Q) What do Capt. Kirk and toilet paper have in common.
    A) They're both out to get the Klingons.

    --
    If you could reason with religious people, there would be no religious people
  21. SETI discovery! by dronkert · · Score: 2, Informative

    Known by all /.ers for seti@home, it was the SETI Institute that made the discovery in cooperation with NASA.