Asteroid - Small, rocky objects that orbit the Sun., Astronaut - A person trained to travel in a spacecraft, Astronomer - A scientist who studies the universe., Atmosphere - The area of air and gas that envelopes Earth and other astronomical objects, Black hole - A place in space where the pull of gravity is so strong that even light can’t get out., Constellation - A group of stars that form a pattern, Cosmos - The universe., Eclipse - When one celestial body blocks light from reaching another by moving between it and its light source., Galaxy - A huge collection of gas, dust and billions of stars and their solar systems held together by gravity., Milky Way - Our galaxy that contains over 200 billion stars., Light year - The distance light travels in one year (nearly 6 trillion miles)., Shooting star - Streaks of light in the sky that occur when meteoroids fall into the Earth’s atmosphere and burn up., Space - The three-dimensional expanse in which all material things exist, Universe - Everything that exists in space., Gravity - The force that pulls objects towards each other.,

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