I don't think bootkeen is wrong. The fact that the author's solution gives 6.10 means something is clearly wrong. 36 guys passing the test means the error is likely not in the algorithm, but in the internal data handling.

Yeah right, I forgot that... ;)

It's not the author who gives the kyu but a moderator...

Well... It's nice to get the points for a 4 kyu but... Why is it 4 kyu??? :o (I'm completely stuck with some of your other mathematical katas that are 6 or 5kyu only, so I'm a bit surprised to get this one in less than 20 minutes! ;) )

'Was approved with another language? (maybe you shouldn't have had translated it to python?)

Anyway, just a question, no importance... (and thanks for the points! ;) )

(PS: java version on it's way ?)

sorry, i was wrong.
looked solutions and found out why it happens.

irrelevant

36 guys passed the Python kata; that is not a lot but enough to reasonably think there are no errors in the tests.

Sorry, but I cannot explain the math myself. Here is a reference though if you are interested: https://en.wikipedia.org/wiki/Square_pyramidal_number

I can not understand description. Each point in catalog has three coordinates. What are they?
[ditancex, distancey, distancez] or [angle, angle, distance] or whatever else?
if there is angle, is it measured in radians?
when we calulate matching stars do we assume that spacecraft didn't shift in space?

I think I have solved this issue :)

What do you think I should do?, warning about don't use the operator ... because babel is going to transpile it to a for loop, or make a regex whick allows only this kind of loops created by babel?

What happens is that when the code is transpiled to ES5 with babel, ...predicates is transpiled to

  for (var _len = arguments.length, predicates = Array(_len), _key = 0; _key < _len; _key++) {
    predicates[_key] = arguments[_key];
  }

So the code transpiled has a for loop... I have to see who I can avoid this exception.