Sending greeting cards to aliens is hardly a new idea. In 2005, Craigslist solicited messages for broadcast to space by a transmitter in Florida, and in 2008, NASA beamed a Beatles song to the North Star (Polaris), on the assumption that any putative Polarians would appreciate the Fab Four's 1960s-genre compositions.

An unsolicited sales pitch may be part of a fraudulent investment scheme. Exercise extreme caution if you receive an unsolicited communication - meaning you didn't ask for it and don't know the sender - about an investment opportunity.