Astronaut vs. Cosmonaut and astronomer

[Blue_Snow]

What's the difference between the words?

[Geo777]

Hi,
You must be kidding.

In English-speaking nations a professional space traveler is called an astronaut, and in Russia is called a cosmonaut (космонавт). An astronaut / a cosmonaut is a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft.

An astronomer is a scientist who studies celestial bodies such as planets, stars, and galaxies.
_________________
Slow but sure.

[Blue_Snow]

Thank you. You're a real Russian.