China and the U.S. are competing as they look to turn space exploration into ​a commercially viable ⁠business similar to civil aviation, as well as becoming the first to exploit the military and ...

Voyager 1 keeps moving farther from Earth than any human-made object. Launched in 1977, it flew by Jupiter and Saturn, sending back images and informa.

While Mercury was quite active in its early days, it has been perceived as dead for a long time because of the static appearance of its surface.