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Astronomers Identify the Sun's Long-Lost Sister

An anonymous reader writes "A team of researchers led by astronomer Ivan Ramirez of the University of Texas — Austin has identified the first 'sibling' of the sun, a star almost certainly born from the same cloud of gas and dust as our star. 'Astronomers had been observing the star for almost two decades without realizing it's the long-lost sister of the Sun. No doubt we have catalogued other solar siblings whose common heritage has yet to be discovered. Indeed, the UT team, lead by astronomer Ivan Ramirez, is confident that the identification of HD 162826 is just the beginning. "We want to know where we were born," Ramirez said in a statement. "If we can figure out in what part of the galaxy the Sun formed, we can constrain conditions on the early solar system. That could help us understand why we are here."'"

21 of 69 comments (clear)

  1. Sol Sister by dhaen · · Score: 4, Funny

    It's the best I can do!

    1. Re:Sol Sister by gigne · · Score: 2

      well played sir, well played.

      No mod points :(

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    2. Re:Sol Sister by DoofusOfDeath · · Score: 3, Funny

      How about, "But is she hot?"

  2. No photos?! by Edis+Krad · · Score: 2, Funny

    Awww c'mon. No photos?! Now I'll keep wondering if Sol's sister was hot or not.
    Well, if it runs in the family, I'd say maybe yea... a few thousand kelvin hot ;)

  3. Sister? by Threni · · Score: 2, Funny

    Surely if it's a son it should be its brother?

    1. Re:Sister? by rmdingler · · Score: 2
      Perhaps, but only if your own sentient birthing vessel wandered into your teenage years oedipal style.

      Is the day after maternal appreciation ceremonies too soon?

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      Ernest Hemingway

  4. Boooriing by jones_supa · · Score: 2

    Where's all the cool aliens? Where's the "earth-like planet" which we can immediately conquer and start growing maize on?

  5. Re:Believe it or not by durrr · · Score: 4, Funny

    I was a bit skeptic when I heard that she weights even more than her sister, but it turns out she's not only incredibly hot, she's also radiant and an important central figure.

  6. What's amazing is that... by Beck_Neard · · Score: 4, Interesting

    On average, that star has only been moving away from the sun at about 16 miles per hour. There are people who can run faster. Yet after these billions of years, even that snail's pace has been enough to put 110 light years between us.

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    1. Re:What's amazing is that... by Beck_Neard · · Score: 3, Interesting

      To reply to my own comment, it's unlikely that that star has been moving away at a steady speed though. Most likely it's been through an insane trajectory that has at times taken it very far away and at times closer, as it orbits around the center of the milky way along with the sun.

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    2. Re:What's amazing is that... by rasmusbr · · Score: 2

      The paper is freely available online and you can see distance and speed estimates on the bottom row of charts at page 13: http://www.as.utexas.edu/~ivan...

      This star is thought to have been following a fairly predictable orbit over the last 4 billion years, which is one of the reasons why they're able to point to it as a potential sibling of the Sun. That is the researchers think that there is a decent probability that it has based on a simulation.

    3. Re:What's amazing is that... by careysub · · Score: 2

      To reply to my own comment, it's unlikely that that star has been moving away at a steady speed though. Most likely it's been through an insane trajectory that has at times taken it very far away and at times closer, as it orbits around the center of the milky way along with the sun.

      Not necessarily. We know of several associations of stars called "moving groups" (the Ursa Major/Big Dipper constellation is largely the core one such group) that have a common origin -- they have the same space velocity vector, and are the same age, and are still relatively close to together in space after hundreds of millions or even billions of years (the Zeta Herculis Moving Group appears to be the oldest known so far -- somewhat older than our own sun). The shared vector means that the stars in a cluster are not going to disperse very far, they will all orbit together in a (slowly growing) region of dispersion.

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  7. Re:Believe it or not by durrr · · Score: 4, Funny

    Men don't have cycles, or spotting, and doesn't discharge things quite as often.
    They also don't become deficient of certain products in old age which causes them to rapidly change appearance.

  8. Why we are here...? by DrPBacon · · Score: 5, Funny

    I thought science had basically decided that we are here simply because we are not over there.

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    1. Re:Why we are here...? by StripedCow · · Score: 4, Insightful

      Obligatory Sesame-street:
      https://www.youtube.com/watch?...

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    2. Re:Why we are here...? by TapeCutter · · Score: 2

      It has but philosophy will continue to ask "why".

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  9. Re:Believe it or not by Ogive17 · · Score: 3, Funny

    You forgot about the part about blowing up when exhausted.

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    "Action without philosophy is a lethal weapon; philosophy without action is worthless."
  10. Re:Believe it or not by TapeCutter · · Score: 2

    +1 Nasal caffeine.

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    And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
  11. Sister? by EvilSS · · Score: 3, Funny

    I think the more amazing thing from this article is that we've apparently figured out how to identify the gender or a star.

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  12. over 20 orbits around galazy since formation by peter303 · · Score: 2

    Of Sun, Earth and sister stars. They may have been separated somewhat in that time. One revolution = 1/4 billion years.

  13. Re:Believe it or not by Impy+the+Impiuos+Imp · · Score: 2

    > Men ... doesn't discharge things quite as often

    Obviously you've never seen the floor around the wastebasket in a teenage boy's room.

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