ars technica: But he broke that rule on Tuesday night when asked on Twitter about the new NASA authorization legislation. by Eric Berger
'"This bill changes almost nothing about what NASA is doing. Existing programs stay in place and there is no added funding for Mars," Musk tweeted. "Perhaps there will be some future bill that makes a difference for Mars, but this is not it," he added.
'Musk is absolutely correct on two counts. First, an "authorization" bill does not provide funding. That comes from appropriations committees. Secondly, while Congress has been interested in building rockets and spacecraft, it is far less interested in investing in the kinds of technology and research that would actually enable a full-fledged Mars exploration program.
'Much of the general news coverage after President Trump signed the NASA authorization bill on Tuesday focused on the legislation's call for sending humans to Mars. (For example, the AP headlined its story "Trump signs bill authorizing NASA funding, Mars exploration"). However, this perception is probably wrong, as Musk points out. There is lukewarm interest in Congress about aggressively funding humans to Mars—which would cost hundreds of billions of dollars to do using traditional aerospace firms—and according to sources Ars has spoken to, such a costly enterprise holds almost no interest within the Trump administration itself.'