Federal funding for basic research by astronomers in the United States
comes primarily from two sources: (1) NASA's Office of Space Science, and
(2) the National Science Foundation. Funding for "astronomy" more generally
is difficult to quantify, since it comes from so many sources. But the
following can give you a sense of what basic astronomical research costs
taxpayers:
So, even if you assume that the revenue for "non-defense discretionary"
comes entirely from personal income taxes, funding basic research in
astronomy is cheap. Out of every $1000 in revenue from personal income
taxes, $365 goes into the non-defense discretionary fund. About $6.80 ends
up in the hands of OSS & NSF. Of this, $2.11 goes to fund the entire
Mathematics & Physical Sciences and Supporting Research & Technology
programs. In the end, for every $1000 in taxes only 66 cents ends up
funding Astronomical Research.