This year marks the half-century of the space age ushered in by the October 1957 launch of the Sputnik-1 by the then Soviet Union, NASA administrator Michael Griffin noted.

In 2057, the centenary of the space era, "we should be celebrating 20 years of man on Mars," Griffin told an international astronautics congress in this southern Indian city where he outlined NASA's future goals.

The international space station being built in orbit and targeted for completion by 2010 would provide a "toehold in space" from where humanity can travel first to the moon and then to Mars, Griffin said.

"We are looking at the moon and Mars to build a civilisation for tomorrow and after that," Griffin added in his remarks at a conference session attended by heads of the world's space agencies.

 Source : Breitbart.com