"Stars trailing around axis of Earth, Mt Semeru"
Lights at the bottom are jeep taking people to various view points for sunrise at Mt Bromo. Note a small light trail created by hikers to Mt Semeru.
This is a stack of 200 images.
You are doing great.
I suggest now you start including some foreground like mountain or trees or any man made object like cars, building etc.
However, you'll need to take just one best file from the foreground and composite it. Photoshop! or some other composite software.