5 ms·

And this is a problem how?

by totalforge 12y ago

ars 12y ago
I dilutes all the meaning out of the word "planet". Words gain meaning not from what they mean, but from what they don't mean.
windsurfer 12y ago
You would have to come up with a new definition for what we currently call planets, since they are clearly different (more massive, more regular orbit, etc). It's more reasonable to call the newly discovered things something different instead of renaming old things.
berberous 12y ago
The mnemonic would become even more tortured than "My very excellent mother just served us nine pizzas"?
- ghshephard 12y ago
  Mother very thoughtfully made a jelly sandwich under no protest. (Terra and Asteroid Belt)
  - dalke 12y ago
    How long does it take to get to Pluto at a constant 8g, with a skew flip for deceleration? Don't use your slipstick.
    - nikbackm 12y ago
      According to Heinlein it was apparently 5 days.
      - dalke 12y ago
        Well, yes, that was the subtext for both my comment and (I believe) its parent comment. FWIW, 2 * sqrt(32.6 AU / (8 * 9.81 m/s/s))) = https://www.google.com/search?q=sqrt%2820+AU+*+2+%2F+%288+*+9.81+m%2Fs%2Fs%29%29%29&ie=utf-8&oe=utf-8#q=2+*+sqrt%2832.6+AU++%2F+%288+*+9.81+m%2Fs%2Fs%29%29%29 https://www.google.com/search?q=sqrt%2820+AU+*+2+%2F+%288+*+... = 5.77 days. Perihelion of 29.657 AU was in 1989, when it would have been 5.5 days. "Have Spacesuit Will Travel" was written in 1958, so the distance to Pluto was about what it is now. Earth orbit variability makes that +/- about 3 hours. Top speed is sqrt(2 * (8 * 9.81 m/s/s) * (32.6 AU/2) ) / (speed of light) = 6.5% of light speed. I'm not sure that Kip and Peewee would have survived 5+ days at 8 g. Apparently the only week-long >1 g tests we've done have been 1.5g, says http://space.stackexchange.com/questions/6154/maximum-survivable-long-term-g-forces http://space.stackexchange.com/questions/6154/maximum-surviv... , though we've done tests for 1,000 seconds (16 minutes) at 4 g.

5 ms·

And this is a problem how?

by totalforge 12y ago

And this is a problem how?

ars 12y ago
I dilutes all the meaning out of the word "planet". Words gain meaning not from what they mean, but from what they don't mean.
windsurfer 12y ago
You would have to come up with a new definition for what we currently call planets, since they are clearly different (more massive, more regular orbit, etc). It's more reasonable to call the newly discovered things something different instead of renaming old things.
berberous 12y ago
The mnemonic would become even more tortured than "My very excellent mother just served us nine pizzas"?
- ghshephard 12y ago
  Mother very thoughtfully made a jelly sandwich under no protest. (Terra and Asteroid Belt)
  - dalke 12y ago
    How long does it take to get to Pluto at a constant 8g, with a skew flip for deceleration? Don't use your slipstick.
    - nikbackm 12y ago
      According to Heinlein it was apparently 5 days.
      - dalke 12y ago
        Well, yes, that was the subtext for both my comment and (I believe) its parent comment. FWIW, 2 * sqrt(32.6 AU / (8 * 9.81 m/s/s))) = https://www.google.com/search?q=sqrt%2820+AU+*+2+%2F+%288+*+9.81+m%2Fs%2Fs%29%29%29&ie=utf-8&oe=utf-8#q=2+*+sqrt%2832.6+AU++%2F+%288+*+9.81+m%2Fs%2Fs%29%29%29 https://www.google.com/search?q=sqrt%2820+AU+*+2+%2F+%288+*+... = 5.77 days. Perihelion of 29.657 AU was in 1989, when it would have been 5.5 days. "Have Spacesuit Will Travel" was written in 1958, so the distance to Pluto was about what it is now. Earth orbit variability makes that +/- about 3 hours. Top speed is sqrt(2 * (8 * 9.81 m/s/s) * (32.6 AU/2) ) / (speed of light) = 6.5% of light speed. I'm not sure that Kip and Peewee would have survived 5+ days at 8 g. Apparently the only week-long >1 g tests we've done have been 1.5g, says http://space.stackexchange.com/questions/6154/maximum-survivable-long-term-g-forces http://space.stackexchange.com/questions/6154/maximum-surviv... , though we've done tests for 1,000 seconds (16 minutes) at 4 g.