Laika was the first dog to orbit the Moon.
....... the closest planet to the Sun.
There is no wind on the Moon.
Neptune is the furthest planet from the Sun.
Nicolaus Copernicus said that the Sun went round the Earth.
A day on Mercury is..... earth days.
Dennis Tito was the first ....... in space.
Astronauts are ......... in space.
Which planet is the second from the Sun?
Which planet is between Venus and Mars ?
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