I've been going through the community solutions and these solutions stood out to me:

I've been going through the community solutions and these solutions stood out to me:

Solution Observations
Link Hard-coding the number of planet classes (10) instead of using the length of the array, could be an actionable comment.
Link This solution uses a Java version >= 17, judging by the usage of the RandomGenerator.nextDouble(double) method added in Java 17. However, those Java versions also contain RandomGenerator.nextDouble(double,double) and RandomGenerator.nextInt(int,int) which support passing both a lower and upper bound, which makes the solution a bit easier to read. Could be an informative comment.

I liked that options, seems that they are more appropriate and can actually help the student!