What Goes Up

What has one eye but can’t see?

I am a sweet fruit. I am not big.

I wear a beautiful red dress. There is a small green hat on my head.

My body has a shape of a heart.

Who I am?

I hiss. I can be poisonous.

I am long. I have a forked tongue.

Who I am?

I am the eighth planet from the Sun. My twin brother is Uranus.

I am the farthest planet from the Sun.

When you want to use me, you throw me away. 

When you're done using me, you bring me in. 

What am I?