On the right, links to interactive pages offer views of solar system , sun, moon , moon orbit earth and planets. It is a nifty tool for budding astronomers or astrologers. I like the daily sky views . Other locations can be calculated. A very instructive tool for learning or teaching astronomy.
Standard email exposes personal or vital business information to anyone.
The recipients do not require unique software, services, or hardware - only a standard brawser and a net connection. Net offers this service PGP Protect important personal or business information, use PGP with it's convenient asymmetric encryption. To use PGP, a public PGP key must be available to everyone. Information will be visible only to users with the same ID and Password. I may use a wrong word or expression.