Space Exploration is the ongoing investigation of the environment beyond Earth's atmosphere. It involves the in-depth examination of relatively close celestial bodies such as the sun, planets and moons, as well as the di... More »

All the advantages of space exploration stem from the fact that it creates an opportunity to discover unknown facts and generate valuable knowledge about the universe. Several discoveries made during space exploration ha... More »

Space exploration is important because it helps facilitate communication, better research of the environment and gives hope for the future. The National Aeronautics and Space Administration is the main body charged with ... More »

According to Universe Today, space begins where the Earth's atmosphere stops. However, the Earth's atmosphere does not stop abruptly. The Earth's atmosphere gradually grows thinner with increasing distance from the surfa... More »

According to data collected by the University of Calgary, space begins and the Earth's atmosphere ends at 73 miles above the Earth's surface. However, other countries and agencies have a differing opinion on where space ... More »

According to LiveScience, as of 2014, 18 astronauts have died during launches or re-entry from space, but none have been lost outside of the Earth's atmosphere. Additionally, three astronauts died in the Apollo 1 fire wh... More »

NASA has operated six space shuttles, beginning with the prototype orbiter, which was flown in Earth's atmosphere during landing and flight tests. Two of the shuttles, Columbia and Challenger, were lost in accidents, and... More »