Tags This page has been tagged without any explanation Please explain why it is Non notable the term has produced 70 000 google hits so someone has heard of it Neologism I can not see any word here that isn t in a dictionary Requiring references There are 3 external links on this page and both of these 35 Who Made a Difference and Amateur Astronomy s Revolutionary on the John Dobson page refer to Sidewalk astronomy At least one of them should qualify as a reliable 3rd party source