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Across

• . 1. a small rocky object that moves around the sun
• . 3. any large bodies that revolve around the sun
• . 5. the curved path of a celestial object or spacecraft round a star,planet or moon
• . 6. a vehicle used for travelling in space
• . 8. study of everything in universe
• . 9. a system of millions or billions of stars, together with gas and dust
• . 10. an object sent to space inorder to collect information of space