http://www.herostratus.ca/ESL.htm
"passed away" is the polite expression for "died".
For example: He passed away in 2012.
Usually it is too direct to say: He died.
Here's a fun video:
The original link is here:
https://www.google.com/doodles
This blog is mainly to explain a different English language expression every day. Sometimes I post other stuff. I also have a YouTube channel which is mostly about computer software: https://www.youtube.com/englishspacedog