'Deimos, the outermost moon of this planet has an average diameter of only 7.8 miles'
Mars
ASTRONOMY & SPACE: Deimos, the outermost moon of this planet has an average diameter of only 7.8 miles
Deimos, the outermost moon of this planet has an average diameter of only 7.8 miles
Deimos, the outermost moon of this planet has an average diameter of only 7.8 miles
ASTRONOMY & SPACE
Mars
ASTRONOMY & SPACE