Simplify the following text for a Grade 9 native English-speaking person.
Original: The Erotian surface gravity varies greatly , since Eros is not a sphere but an elongated peanut-shaped ( or potato - or shoe-shaped ) object .
Simplified: The Erotian surface gravity changes a lot , since Eros is not a sphere but a stretched peanut-shaped ( or potato - or shoe-shaped ) object .