Imagine that you are an astronomer. Using each of the following nouns or noun phrases as appositives, write four sentences about your experiences: a distant star, Andrea Ghez, my best friend, and Sagittarius.

Four sentences that have appositives can be:

The Sirius, a distant star, has its own star cluster.

I met that scientist, Andrea Ghez, when i was teaching at that school.

Once, while analyzing data with Michael, my best friend, we discovered a new asteroid.

The constellation that spans 240-270th degrees of the zodiac, Sagittarius, is is the ninth astrological sign.