Download moon images from NASA

nasa2014MoonPhases.rb

require 'date'

base_uri = "http://svs.gsfc.nasa.gov/vis/a000000/a004100/a004118/frames/1920x1080_16x9_30p/plain/"

moon_num = 1

day = Date.new(2014,1,1)

while day.year == 2014 do
  filename = "moon.#{"%02d" % day.mon}.#{"%02d" % day.mday}.#{day.year}.tif"
  `curl #{base_uri}moon.#{"%04d" % moon_num}.tif > #{filename}`
  puts "downloaded: " + filename
  moon_num = moon_num + 24
  day = day.next_day
end