You are correct.
The sentence "I had goosebumps and the hairs on my arms were standing straight up" gives the greatest amount of description and the details included appeal to the senses.
"The space shuttles is the subject."
Simple formula: find the verb of the sentence then ask the question "who or what performs the verb" and the answer to that question is the SUBJECT of that sentence!
In your sentence; ask the question;
"Who or what have made travel to the International space station convenient and possible?
Answer: The space shuttles (that's your subject)
Answer:nevergonnagiveyouup
Explanation:1=(2+4)12