NASA's Hubble Celebrates 21st Anniversary with "Rose" of Galaxies. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
Hubble Goes High Def to Revisit the Iconic 'Pillars of Creation' Messier 16 (The Eagle Nebula). Original from NASA. Digitally… Free Image from public domain license 
Image of a nebula taken using a NASA telescope -
Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license