An American who is in space is called __ ______.
an astronaut.
There __ _ oxygen on planets in other galaxies.
may be
Astronauts and kosmonauts use a _____ to get to orbit.
rocket
The Sun is the biggest object in our ____ ____ .
solar system
Mercury, Venus, the Earth, and Mars are all _____ .
planets
Earth has __ ______, and that is why we can breathe.
an atmosphere
Astronomers use telescopes to learn more about outer _____ .
space
The ISS is the biggest ____ _____ humans have built so far. Astronauts and kosmonauts have been working there for 20 years.
space station
Many people like watching ______ in the sky because of their bright tale.
comets
The Milky Way is our _______.
galaxy
This photo shows a famous ______ .
spacecraft
There __ no oxygen on the Moon.
is
"Curiosity" is a _____ that collects information about the soil on Mars.
rover