here's your correct answer.. please copy it..
Because a star is a peace of the sun and the sun is hot so the star get it energy from the Sun .
It definitely changes in frequency. For example if the frequency is medium the signals change after the sunset and it changes in the ionosphere cause medium frequency travels in the skywave.
I may be wrong but does it mean it was revent? because i know shortly after someone dies your body becomes fully stiff so maybe it was recent and it's in the process off stiffening up