Mars: Size, distance from the Sun, orbit

Mars is the fourth planet from the Sun and orbits roughly 142 million miles (229 million km) away from the Earth.

Mars Facts - Interesting Facts about Planet Mars

How Far is Mars from the Sun? - Universe Today

How Far is the Asteroid Belt from the Sun? - Universe Today

Orbital Transfer (Space Probe Orbits) Calculation between Planets

Mars Opposition Brings The Planet Up Close, Shining Bright : NPR

Mars planet Canadian Space Agency

How far away is Mars, why is the planet red and how long does it take to get there?

What is the smallest planet? (It's not Pluto.) Taking a closer look at planet sizes.

Mars to be closest to Earth in October; here's how to look at Red Planet - BusinessToday

Solar System - Wikipedia

Mars: Size, distance from the Sun, orbit

Solar System Review