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kchangnyt's profile
Kenneth Chang
Kenneth Chang
Kenneth Chang
@kchangnyt

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Kenneth Chang

@kchangnyt

Science reporter at the New York Times. Pluto, dinosaurs, NASA, viral math & more...

New York, NY
nytimes.com/by/kenneth-cha…
Joined April 2014

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    1. Kenneth Chang‏ @kchangnyt 16 Nov 2016
      Replying to @DavidHesperos @gmusser

      it’s tidal forces. 2 stable pts: directly under Charon or on opposite side. Starting pt determines ending pt.

      1 reply 0 retweets 0 likes
    2. David Hesperos‏ @DavidHesperos 16 Nov 2016
      Replying to @kchangnyt @gmusser

      Have to take your word for it, illogical as it may seem, since that's not my area of expertise, but still...

      1 reply 0 retweets 0 likes
    3. Kenneth Chang‏ @kchangnyt 16 Nov 2016
      Replying to @DavidHesperos @gmusser

      Same concept as ocean tides on Earth. One high tide under Moon, also high tide the side of Earth opposite from Moon.

      3 replies 0 retweets 0 likes
    4. David Hesperos‏ @DavidHesperos 17 Nov 2016
      Replying to @kchangnyt @gmusser

      On earth, bulges on both sides have the same density. Not so on Pluto. Imagine a lead weight glued to a ping pong ball.

      1 reply 0 retweets 0 likes
    5. Kenneth Chang‏ @kchangnyt 17 Nov 2016
      Replying to @DavidHesperos @gmusser

      1. Imagine weight starts at far side of Pluto. Then try to rotate it to move it to position under Charon.

      2 replies 0 retweets 0 likes
    6. David Hesperos‏ @DavidHesperos 17 Nov 2016
      Replying to @kchangnyt @gmusser

      Why would it start on the side away from Charon?

      1 reply 0 retweets 0 likes
    7. Kenneth Chang‏ @kchangnyt 17 Nov 2016
      Replying to @DavidHesperos @gmusser

      In reality, starting point is random. I'm just trying to explain why it's a stable point.

      1 reply 0 retweets 0 likes
    8. David Hesperos‏ @DavidHesperos 17 Nov 2016
      Replying to @kchangnyt @gmusser

      I agree it's stable. What I'm saying is that it's unlikely. Consider Mercury and the sun.

      1 reply 0 retweets 0 likes
    9. Kenneth Chang‏ @kchangnyt 17 Nov 2016
      Replying to @DavidHesperos @gmusser

      Then start thinking what happens for various starting points. If it's 5 deg away from opposite, will it flip?

      1 reply 0 retweets 0 likes
    10. David Hesperos‏ @DavidHesperos 17 Nov 2016
      Replying to @kchangnyt @gmusser

      Suspect yes, but math is required.

      1 reply 0 retweets 0 likes
      Kenneth Chang‏ @kchangnyt 17 Nov 2016
      Replying to @DavidHesperos @gmusser

      Do the math. Seems Sputnik Planitia started several hundred miles away and rotated 60 deg to get to current spot.

      10:14 AM - 17 Nov 2016
      1 reply 0 retweets 0 likes
        1. David Hesperos‏ @DavidHesperos 17 Nov 2016
          Replying to @kchangnyt @gmusser

          Just checked the density of solid N2. It's >1. Surprising to me so who knows? Interesting topic and discussion. Thanks!

          0 replies 0 retweets 0 likes
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