Six planets will line up in the early morning sky on June 3, but most won’t be visible to the naked eye. A planetary parade happens relatively often when several planets align on the right side of the sun, making them visible across a narrow band of our sky. During the latest parade, astronomers say only Mars and Saturn will be visible to the naked eye. The other planets can only be spotted with a telescope or will be blocked out below the horizon. You can still catch a glimpse of Mars and Saturn through the end of summer. Six planets will line up in the early morning sky on June 3, but most won’t be visible to the naked eye. A planetary parade happens relatively often when several planets align on the right side of the sun, making them visible across a narrow band of our sky. During the latest parade, astronomers say only Mars and Saturn will be visible to the naked eye. The other planets can only be spotted with a telescope or will be blocked out below the horizon. You can still catch a glimpse of Mars and Saturn through the end of summer. AP Technology and Science