Simple Present tense

Use the Simple Present to express the idea that an action is repeated or usual. The action can be a habit, a hobby, a daily event, a scheduled event or something that often happens. It can also be something a person often forgets or usually does not do.

Examples:
I play tennis.
She does not play tennis.
Does he play tennis? 
The train leaves every morning at 8 AM.
The train does not leave at 9 AM.
When does the train usually leave? 
She always forgets her purse.
He never forgets his wallet.

Every twelve months, the Earth circles the Sun.Does the Sun circle the Earth?

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