I went to a planetarium at Itami City Children's cultural Scientfic Museum
They said all of the stars are NOT flashing.(またたかへんと。)
The planetarium expressed the fact.
And they didn't say the reason.
I didn't know the fact.
I had thought all the planets and stars are flashing.
So I searched on Google.
It seems that the planets are not flashing but the stars are flashing from the Earth view.
The reason seems to be that the stars are points light sources(点光源), but the planets are not…