Discovered 40 years ago today, Charon, the largest of Pluto's five moons, fueled the dwarf planet’s evolution from a telescopic dot into an actual planetary system – and a source of many discoveries yet to come: https://go.nasa.gov/2K0qb9D | NASA - National Aeronautics and Space Administration

218 reactions · 101 shares | At more than half the size of Pluto, Charon is the largest moon relative to it’s planets size in the solar system, and NASA just released some impressive images of the mega moon fresh from New Horizons. (Via Vocativ) | New York Daily News | Facebook