I have and also sell 3d planets to fellow artist and animators.
Many of my own personal images are space scenes.
I have had seti @ home installed on and off for many years.
Thoughts about SETI and SETI@home
1. Do you think extraterrestrial life exists?
-- yup- somewhere out there.
Is it possible to travel and communicate with them- probably not-considering the distances and time differences. Best we can do it pick up there radio pollution.
harm- only from the data we could get- but even that is minimal.
2. Should humans transmit a beacon for others to find?
-- yup- why not- if anyone isn't within a couple hundred lightyears max (highly unlikely) then they can't get here either, so no worries.
3. What information should we send;
Prime numbers as a sig- then the encyclopedia of man, constantly updated and continually repeated , and published on the net and in every libary on earth.
It's not that anyone who recieves it in a multipule hundreds of thousands of years or millions or more of years can use it against us. And imagine- in say 10 million years- long after we are gone- a civilization like ours awaking from the long night of primativeness- to recieve such a head start.
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.