NASA's George Diller said the station is easily visible from Earth because it is more than "It is a large object, getting bigger all the time."

VOA: standard.2010.04.05

NASA officials say plans to build out and expand the station are more than 90 percent complete, mainly thanks to space shuttle and its large cargo capacity.

VOA: standard.2010.04.05

Current was not part of any large station group.

FORBES: Does Time Warner Cable's Decision To Stop Carrying Current TV After It Was Sold To Al Jazeera Amount To Censorship?

Today, most big man-made carbon-dioxide emitters, such as a large power station, are known about and their outputs are measured.

ECONOMIST: Two new satellites will monitor carbon-dioxide emissions

Launching their large space station will require a new heavy lift vehicle, the Long March 5, which is still in development and behind schedule.

CNN: Will China overtake America in space?