'Super' Grand Canyon on Pluto's moon Charon
The deep canyon named Argo Chasma is approximately 700 km long while Arizona's Grand Canyon is 450 km long.
Jun 24, 2016, 10:45 AM IST
The deep canyon named Argo Chasma is approximately 700 km long while Arizona's Grand Canyon is 450 km long.
Jun 24, 2016, 10:45 AM IST