spiral galaxy photo collage. m31-m51-m101. s of this picture furnished by nasa

astrology astronomy astrophotography background black canes celestial clouds collage constellation cosmic cosmos creation deep dust elements expanse field furnished galactic galaxy gas glow hubble hydrogen infinity interstellar m101 m31 m31m51m101 m51 nasa nature nebula nebulae night observatory orbit outer photo picture planetarium plasma science sky space spiral star starlight stars stellar telescope this universe venatici