پاورپوینت درباره سیارات منظومه شمسی به انگلیسی در 30 اسلاید. Mercury is the closest planet to the Sun in the solar system and the fastest planet in the solar system, orbiting the Sun at a speed of about ۴۸ kilometers per second every ۸۸ days. Hence it is an elusive planet, and that is probably why t