Words Describing the Sun:

Brightness & Heat:

* Brilliant

* Glowing

* Incandescent

* Blazing

* Fiery

* Scorching

* Radiant

* Luminous

* Searing

* Warmth

* Golden

Size & Power:

* Massive

* Colossal

* Immense

* Powerful

* Dominant

* Mighty

* Unstoppable

Appearance:

* Round

* Orange

* Yellow

* Red (at sunset)

* Dazzling

* Blinding

Effects:

* Life-giving

* Nourishing

* Essential

* Energizing

* Inspiring

* Awe-inspiring

Words Describing the Stars:

Brightness & Distance:

* Twinkling

* Sparkling

* Shimmering

* Distant

* Faint

* Brilliant (for the brightest stars)

* Magnificent

Appearance:

* Pinpricks

* Diamonds

* Pearls

* Dust

* Scattered

* Celestial

Other:

* Myriad

* Infinite

* Mysterious

* Ancient

* Eternal

* Silent

* Constellations

* Galaxies

Figurative Language:

* Starlight

* Stardust

* Cosmic

* Celestial bodies

This is just a starting point. The words you choose will depend on the specific context and the feeling you want to convey.