The Horsehead Nebula B 33 is a dark nebula that stands out over the emission nebula IC 434; at the bottom on the right there is the NGC 2023 nebula with the star HD 37903 in the center.
NGC 7635, also known as the Bubble Nebula, is located in the constellation Cassiopeia and consists of a bubble-shaped nebula generated by the stellar wind of a star at its center and which is expanding into a larger nebula.