Astronomy Practice Exam 2026 – 400 Free Practice Questions to Pass the Exam

Neptune is indeed known as the eighth planet from the Sun and is notable for its extremely windy atmosphere. Winds on Neptune can reach speeds of up to 1,500 miles per hour, making it one of the windiest places in our solar system. This distinctive characteristic, along with its deep blue color caused by the presence of methane in its atmosphere, sets Neptune apart from other planets.

Other options relate to different types of celestial bodies. For example, a dwarf planet refers specifically to a category of objects that orbit the Sun, like Pluto, but are not classified as full-fledged planets. These types of bodies are typically smaller and have not cleared their orbits of other debris. The choice referencing a small celestial body composed of ice could imply comets or icy moons, which do not accurately represent Neptune's classification as a planet. Lastly, the mention of a relatively large satellite orbiting Earth suggests familiarity with moons, like the Moon itself, which is distinct from Jupiter's or Neptune's many moons.