Followers of astronomy were in for a surprise on Friday, when Donald Trump announced that the moon is part of Mars.

In a tweet, apparently commenting on his own administration’s space policy, the president said: “For all of the money we are spending, NASA should NOT be talking about going to the Moon - We did that 50 years ago.”

He added: “They should be focused on the much bigger things we are doing, including Mars (of which the Moon is a part), Defense and Science!”

For all of the money we are spending, NASA should NOT be talking about going to the Moon - We did that 50 years ago. They should be focused on the much bigger things we are doing, including Mars (of which the Moon is a part), Defense and Science!

— Donald J. Trump (@realDonaldTrump) June 7, 2019