NASA educational material: Discovery & New Frontiers Space Thrills Poster. Discover Program Poster (2006) illustrated by… https://www.rawpixel.com/image/10201247/image-galaxy-person-spaceFree Image from public domain licenseNASA educational material: Discovery & New Frontiers Space Thrills Poster. Discover Program Poster (2006) illustrated by… https://www.rawpixel.com/image/10184909/image-galaxy-person-spaceFree Image from public domain license