Starting nearest the sun through solar system:
⇒ Mercury
⇒ Venus
⇒ Earth
⇒ Mars
⇒ Jupiter
⇒ Saturn
⇒ Uranus
⇒ Neptune
There used to be 9 planets tho because in the late 1990s scientist argued whether Pluto is a planet. In 2006, International Astronomical Union decided to call Pluto a "dwarf planet" reducing 9 planets to 8.
