We know more about the Moon’s surface than Earth’s ocean floor — but that’s changing fast. A NASA-supported team used a ...

ALXA, March 22 (Xinhua) -- In early spring, Helan Mountain, with an average altitude exceeding 2,000 meters, retains its snow-capped peaks and frozen rivers. Follow Xinhua's lens to witness the ...

As each orbit is made the satellite can view a 1,600 mile (2,700 km) wide area of the earth. Due to the rotation of the earth the satellite is able to view every spot on earth twice each day.