In 1961, Yuri Gagarin became the first person to orbit ________
the Sun
Mars
the Earth
the Moon
In ________, Apollo 11 landed on the Moon.
1949
1969
1979
1959
Engineers built spacecraft that astronauts could live and ___ experiments.
observe
develop
perform
discover
The Hubble telescope is a _______ that observe the solar system and the universe.
sample
satellite
space station
equipment
______ spacecraft are an integral part of the discovery of our solar system and beyond.
effective
scientific
unmanned
international
The first international spacecraft is ______
Skylab
Hubble
Mir
the Apollo-Soyuz
Yuri Gagarin is a/an ________ astronaut.
American
Canadian
European
Russian
Some satellites are used for communication, GPS, and _________
performing experiments
housing astronauts
sending people into space
weather forecasting
