Actually, it is Rocket Science. With over fifty years devoted to the civilian space program, and aerospace and aeronautics research, it's no wonder the demand for official Nasa apparel is so sky-high.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.