Here are the planets in our solar system that are less than 2,000,000,000 miles from the Sun:

* Mercury: Average distance from the Sun: 36 million miles

* Venus: Average distance from the Sun: 67 million miles

* Earth: Average distance from the Sun: 93 million miles

* Mars: Average distance from the Sun: 142 million miles

Important Note: These are average distances. The orbits of planets are elliptical, so their distance from the Sun varies throughout their year.