A supergiant is a very big and bright star.
Supergiants are very important in space and can make people think of wonder and amazement.
Examples:
The supergiant star shines brightly in the sky.
We learned about supergiants in science class.
The supergiant is the biggest star in the sky.
I saw a supergiant in a book about space!
The supergiant star is so big, it could fit a million Earths inside.
The supergiant is the king of all stars.