NASA plans to return astronauts to the moon by 2020 , build U.S. by 2020 . NASA new fleet of space vehicles will replace the space shuttles . Critics say Constellation Program 's should skip the moon and set its sights directly on the Red Planet . Independent panel is reviewing plans and looking at `` potential alternatives ''
NASA plans to return astronauts to the moon by 2020 , build outpost by 2025 . Constellation Program 's new fleet of space vehicles will replace the space shuttles . Critics say NASA should skip the moon and set its sights directly on Mars . Independent panel is reviewing plans and looking at `` potential alternatives ''