... NGC 7635: The Bubble . ... Blown by the wind from a star, this tantalizing, ghostly apparition is cataloged as NGC 7635, but known simply as The Bubble Nebula. ... Clouds and Sand on the Horizon of Mars . ... Like the robotic Opportunity rover rolling across the red planet, you might well see vast plains of red sand, an orange tinted sky, and wispy light clouds. In the Shadow of Saturn . ... In the vast Orion Molecular Cloud complex, several bright blue nebulas are particularly apparent. ...