A close up view of the Rosette Nebula. The red color comes from Hydrogen. https://www.rawpixel.com/image/8718049/photo-image-space-plane-public-domainFree Image from public domain licenseImage of a nebula taken using a NASA telescope - Original from NASA. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/441224/free-photo-image-nasa-nebula-astronomyFree Image from public domain licenseImage of a nebula taken using a NASA telescope - Original from NASA. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/440524/free-photo-image-galaxy-star-dust-spaceFree Image from public domain license