LART icon needed
agreed with Mr. Hagan. someone requires adjustment with clue bat.
if you are a contractor, submit a proposal (paper trail, primacy of idea). if you convene a meeting at a company like Google, and describe something that works somewhat like the previously mentioned Stellarium, but online, expect to have your idea implemented, minus you.
Google employs some very bright people. why would they pay a contractor to do something they can probably implement faster and better in-house? since the idea has much prior art, they can rightfully claim it is not novel, and hang you out to dry.
he can't be a very experienced contractor, if he thought a corporate slogan would protect him. most companies take ideas from outside and implement them in-house. this happens EVERY DAY. if you want them to use your services, bind them with a contract; otherwise, suck it up.