Out space, also known as outer space, refers to the vast expanse beyond Earth's atmosphere where stars, planets, asteroids, and other celestial bodies are located. There are many synonyms for out space, including the cosmos, universe, space, the big beyond, the great unknown, the heavens, deep space, and the void. Each of these terms paints a picture of the vast and mysterious expanse of space that humans have yet to fully explore and understand. Whether you're a space enthusiast or simply curious about the universe beyond our planet, these synonyms for out space help to convey the awe-inspiring scale and complexity of the cosmos.