* Sun: The Sun is a sphere (almost perfectly round). It's a giant ball of hot gas held together by its own gravity.

* Moon: The Moon is also a sphere, although it's not perfectly round. It's slightly squashed at the poles and bulges at the equator due to the gravitational pull of the Earth.

* Planets: Planets are generally spheres as well. Their shape is determined by their own gravity, which pulls matter towards the center, creating a roughly spherical form.

* Stars: Stars, like the Sun, are spheres. They are immense balls of hot, glowing gas held together by their own gravity.

Important Note: The shapes of celestial objects can be slightly distorted by factors like rotation and gravitational interactions with other objects. For example, Jupiter's rapid rotation causes it to have a slight bulge at its equator.