Most people experience stage fright when going on stage for whatever reason. It is very normal to be scared or nervous in front of huge crowds on a stage either due to first time jitters or being introverted and not used to it.
When doing new or frightening tasks your body will show signs of being nervous. This is normal because it makes you realize what you are doing is important.
The word astronauts in the sentence is functioning as the direct object.
Direct objects are often a noun phrase that refers to a person or thing that <u>receives</u> the action of the verb. In order to spot a direct object within a sentence, remember to ask yourself “who” or “what” is receiving the action. The answer in this case would be: <em>"the austronauts". </em>
