Space art postcards from the Soviet era by Russian illustrator Andrei Sokolov (1963-1980).

Saturn. No date.
Saturn. No date. © Estate of the artist. Fair use license. via https://twitter.com/humanoidhistory/status/1134974013820854272
Untitled. No date.
Untitled. No date. © Estate of the artist. Fair use license. via© 2020 Vintage Technology. Fair use license. via https://vintagetech.blognook.com/2019/06/03/soviet-postcards-featuring-space-art-by-andrei/
Untitled. No date.
Untitled. No date. © Estate of the artist. Fair use license. via https://scientificillustration.tumblr.com/page/2
tumblr_pqj3rcEi3Y1qigaa4o1_1280
Untitled. No date. © Estate of the artist. Fair use license. via https://vintagetech.blognook.com/2019/05/19/1965-soviet-postcard-with-space-art-by-andrei-3/
Soviet space station of the future.  No date.
Soviet space station of the future. No date. © Estate of the artist. Image © 2020 Vintage Technology. Fair use license. via https://vintagetech.blognook.com/2018/04/03/a-soviet-space-station-of-the-future-illustra/

Outer space art by American artist Robert McCall (1919-2010).

"The Spirit of Challenger." 1995.
“The Spirit of Challenger.” 1995. © Estate of the Artist. Fair use license. via http://mydelineatedlife.blogspot.com/2011/02/bit-idealistic.html
"What Lies Beyond."
“What Lies Beyond.” Undated. © Estate of the artist. Image © McCall Studios. com. Fair use license. via http://www.mccallstudios.com/what-lies-beyond/
Painting. No exact date.
Painting. No exact date. © Estate of the artist. Image © McCall Studios.com. Fair use license. via https://skysnail.livejournal.com/862355.html