Question

The story of space exploration began with unmanned exploration, moved into a period of manned exploration, and now appears

Answer 1

appears to be moving back toward unmanned exploration in the form of deep-space satellite exploration.

Answer 2

Answer:

appears to be moving back toward unmanned exploration in the form of deep-space satellite exploration.

Explanation:

NASA moved from unmanned probing of space in its initial stage of space exploration to manned space exploration and moon landing and now has gone back to unmanned exploration into deeper space. Deep space is not completely known yet, and the exploration take year and are probably very dangerous for manned exploration for now.