I've never really agreed with putting SF together with Fantasy, because they are slightly different genres. Some science fiction writers have used genuine science to underpin their writings, one of the more recent examples of that would be "the Martian". Fantasy doesn't need that kind of technical detail.

It parallels other developments. There is an increasing scepticism around science, and a significant number of people do not believe in the Moon landing. The heroic age of space travel has been replaced by school teachers and guys busking in tin cans in near Earth orbit. It's become mundane and the most exciting things in space exploration are being done by probes not humans nowadays.