NASA has opened applications for its next class of astronaut candidates as it prepares for future missions to the Moon and Mars.

Axar.az reports, citing NASA, that US citizens interested in joining NASA’s astronaut corps have until 11:59 p.m. EST on December 3 to submit their applications. The agency expects to announce its final selection in late 2027, with successful candidates then beginning their training.

NASA Administrator Jared Isaacman said the selected astronauts could take part in missions to the Moon, live and work at a planned lunar base, and help develop systems for future crewed missions to Mars.

"This is an extraordinary time to join NASA’s astronaut corps. The people we select could walk on the Moon, live and work at the Moon Base, and help pioneer the systems and operations that will ultimately carry crews to Mars," Isaacman said.

The basic eligibility requirements include US citizenship and a master's degree in a relevant science, technology, engineering, or mathematics (STEM) field. Applicants must also have at least three years of relevant professional experience after completing their qualifying degree.

The advanced degree requirement may also be met through certain doctoral studies, medical qualifications or completion of a recognised test pilot school programme. Specific flight-hour requirements apply to pilot applicants.

Candidates must also pass NASA's long-duration astronaut flight physical and demonstrate strong leadership, teamwork and communication skills.

"The window is open. The mission is waiting. And the only thing missing from the greatest adventure humanity has ever embarked upon is you,” said NASA Deputy Administrator Matt Anderson.

NASA last opened astronaut applications in 2024. More than 8,000 people applied, and 10 candidates were selected in 2025. They are currently completing nearly two years of training.

The agency has selected 370 astronaut candidates since the 1960s and currently has 32 active astronauts. Its future plans include expanding human exploration of the lunar surface through the Artemis programme and laying the groundwork for the first crewed mission to Mars.