Imagine a world where astronauts explore a galaxy made entirely of colorful nebulae, traveling in sleek, futuristic spaceships that resemble giant celestial beings. The sky is filled with shimmering stars and planets, each one with its own unique ecosystem waiting to be discovered. Describe this breathtaking scene in vibrant detail, capturing the awe and wonder of space exploration in a breathtaking cosmic landscape.

Visualize a universe where astronauts of varying genders and descents, including but not limited to Caucasian, Hispanic, and Middle-Eastern, navigate a galaxy composed entirely of luminous nebulae. These astronauts voyage in streamlined, advanced spaceships that mimic the form of gigantic cosmic entities. The celestial canvas overhead is studded with twinkling stars and planets, each harboring its distinct ecosystem waiting to be discovered. In this arresting scene, vividly depict the colors and patterns of the nebulae, the sleek design of the spaceships, and the different characteristics of the stars and planets. Convey the awe and thrill of space exploration within a captivating cosmic scenery.