1. Simple:

* Ngaa mataas gid ang langit? (Why is the sky so high?)

2. More descriptive:

* Ngaa daw indi matabok ang langit? (Why does the sky seem unreachable?)

* Ngaa daw layo gid ang langit sa aton? (Why does the sky seem so far away from us?)

3. Using a metaphor:

* Ngaa daw pareho lang ang langit sa isa ka malapad kag mataas nga tolda nga nagatabon sa kalibutan? (Why does the sky seem like a wide, high tent covering the earth?)

4. Asking about the reason:

* Ano ang rason kon ngaa mataas ang langit? (What is the reason why the sky is high?)

5. Asking about the purpose:

* Para ano ang mataas nga langit? (What is the purpose of the high sky?)

The best translation will depend on the context and the specific aspect of the "high sky" you want to emphasize.