An ______ travels into space on a rocket., An ______ studies stars and planets., A ______ moves around a planet in space., The Moon is in ______ around the Earth., The Sun is a ______., Our planet is called ______., A ______ has a bright tail and travels through space., The Milky Way is a ______., A ______ helps us see distant stars., The Earth is part of the ______ ______., A ______ ______ is where astronauts live in space., ______ keeps us on the ground., The Earth has one natural ______., Mars is a ______., The rocket is 30 cm in ______., The box has a ______ of 20 cm., The mountain has a ______ of 2,000 m., The car’s ______ is 100 km per hour., The school is 5 km ______ from my house., 1,000 is a ______., 1,000,000 is a ______., 1,000,000,000 is a ______., 100 is a ______., A ______ ______ lets you practice flying a spacecraft., Astronauts wear a ______ ______ in space., In ______ ______, people travel to space for fun., A person who travels in space for fun is a space ______., A ______ ______ checks if a spacecraft works., In space there is ______ ______., A ______ helps you land safely from the sky., ______ is a gas that makes balloons float., We need ______ to breathe., The rocket ______ gives it power., A ______ can carry astronauts back to Earth., The ______ ______ is the fastest speed of sound., The scientist made an ______ in the lab., The Moon has a weak ______., The robot sent ______ to Earth., The rover left a ______ on Mars., Objects ______ in zero gravity., The rocket will ______ on the Moon., The astronaut is ______ ______ the spaceship., The rover explored the ______ of Mars., Venus and Mercury are planets in our ______., Some stars are ______ at night..

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