Complete the sentences using the correct form of the verbs: •launch, •orbit, •blast, •re-enter, •land, •explore, •float, •rotate. Check in the Word List at the back of the book or your digital dictionary. 1) We have a day and a night because the Earth once every 24 hours.
2) The USA its first astronaut into space in 1961.
3) The rocket will off after the countdown.
4) Astronauts when they are in the space station because there is no gravity in space.
5) When the spacecraft the atmosphere, it has to slow down enough to land safely.
6) One of the goals of NASA is space and find inhabitable planets.
7) Earth the Sun once every 365 days.
8) Unfortunately, the astronauts of the Apollo 13 mission never on the Moon.​