North Korea's successful launch of a long-range rocket, in the face of international opposition, indicates Pyongyang has taken a major step in its effort to develop a missile capable of reaching the U.S. West Coast, which would give the hermit nation a significant bargaining chip to use against Washington.

Experts said Wednesday's launch shows North Korea has made important advances after a similar attempt in April failed.

The Korean Central News Agency also announced that a satellite carried by the rocket entered orbit and proclaimed the launch a success. The U.S. military also confirmed that an object entered orbit.