Sylvia Else wrote:

On 13/12/2017 2:47 AM, David Spain wrote:

However orbiting a CD of Bowie songs, including Space Oddity, ought not
to be out of the question. And would keep the aliens busy for a long
time....


Do CDs, even pressed CDs, work after hundreds of millions of years?


Pressed CDs are good for around a century. Burned CDs are an order of
magnitude less.


--
"Rule Number One for Slayers - Don't die."
-- Buffy, the Vampire Slayer