Lee Billings of Scientific American has a great, lengthy article on the "Decadal Survey," or Astro2020, the Astronomy and Astrophysics Decadal Survey. This report, which comes out every ten years and is a year overdue but is now in final peer review and supposed to be coming out sometime soon, sets priorities for US astronomical projects for the next ten years. It's so important towards determining which megatelescopes get funded that, as someone in the article says, it's sometimes called "the voice of God." As I'm currently writing a long article about astrobiology, I found it very clarifying and insightful.
Anyway, in terms of the Decadal Survey's impact on funding priorities, there's this interesting and revealing quote near the end of the article. "Tremblay" is Grant Tremblay, an astronomer at the Center for Astrophysics at Harvard University and the Smithsonian Institution, then there's this wonderful (in its way) quote from a "Beltway insider."
Or rather the New Great Observatories can only happen if astronomers become more savvy at what Gaudi has termed “astropolitics.” “I’m utterly convinced a ‘New Great Observatories’ program with Lynx, Origins, and LUVOIR or HabEx—a ‘LuvEx,’ so to speak—could be done with a single phone call to the right person,” Tremblay says. “Because on Capitol Hill, it’s not about total cost—it’s about annual appropriation. A couple hundred million dollars a year added to NASA’s astrophysics line would suffice.”
Such hopeful speculations are not necessarily just wishful thinking. “We’re talking a 1 or 2 percent increase in real dollars to NASA’s budget to enable another Great Observatories program,” says one Beltway insider. “These are the perturbations concerted advocacy can create. Only about 30 senators are really involved in appropriations, and the annual discretionary budget of the federal government is running at about $2 trillion. So divide $2 trillion by 30 and then factor in the staffers working for each of those senators. You’ll find, perhaps to your horror, that anything much below about half a billion dollars a year is essentially left to staffers and lost in the margins.” Tremblay puts it more bluntly. “NASA does not really work for the Executive Office of the President,” he says. “It works for the 25-year-olds a few years out of college who serve on appropriations committees. A flagship mission—or a whole new series of Great Observatories—could be green-lit over lunch by some low-level staffer while they’re eating a burrito.”