All the beautiful space images I have used thus far come from one of three places—NASA , Hubble Space Telescope or the Space Telescope Science Institute.
The gorgeous image of the Sun and Moon I use as my profile photo links here.
I am also beginning to use vintage public domain art pieces I found here.
All images link back to the original site from which I borrowed . . .
Sometimes I use personal photos taken while walking my dogs.
Enjoy.
Eleventh House Luminaries 