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Across 3. a small, irregularly shaped object in space that orbits our Sun 4. an object in space orbiting a star 5. the star at the center of the Solar System 7. the galaxy that contains our Solar System 8. an icy small Solar System body that, when passing close to the sun, develops a “tail.” 10. a natural satellite of a planet 11. a massive, luminous sphere of plasma held together by its own gravity

Down 1. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction 2. the Sun and the objects that orbit it 6. all of spacetime and everything that exists in it; It is all matter and energy. 9. curved path of an object around a point in space