Which is the closest star to earth?

1. Mars

2. Sol

3. Aldebaran

4. Proxima Centauri

Sol (92.96 million miles, or 0.00001581 light years away)

Explanation:

1. Mars isn't a star

2. Sun (or Sol) is 92.96 million miles away from Earth.

3. Aldebaran is 65.23 light years away from Earth.

4. Proxima Centauri is 4.243 light years away from earth.

4

Explanation:

Proxima Centauri is about 4.22 light-years from Earth and is the closest star other then the sun