Patterns of motion in the sky 2

They are giant spheres of superhot gases most of them are hydrogen and helium.

The wide space that contains celestial objects is called .........................

It is a group of stars, planets, and gases held together by gravity.

The Sun is not considered as a star. (T or F)

Stars are solid objects made up of rocks. (T or F)

Stars are mostly made up of nitrogen and helium gases. (T or F)