NASA has touted its bold plan to return American astronauts to the moon by 2024 for months. Now we’re starting to get an idea of how much it will cost. From a report: The space agency will need an estimated $20 billion to $30 billion over the next five years for its moon project, NASA Administrator Jim Bridenstine told CNN Business on Thursday. That would mean adding another $4 billion to $6 billion per year, on average, to the agency’s budget, which is already expected to be about $20 billion annually. Bridenstine’s remarks are the first time that NASA has shared a total cost estimate for its moon program, which is called Artemis (after the Greek goddess of the moon) and could send people to the lunar surface for the first time in half a century. NASA wants that mission to include two astronauts: A man and the first-ever woman to walk on the moon.