That X-37 photo in the wiki article had me go down the "payload fairing" rabbit hole. Still don't quite know what the "bubble wrap" is on the inside. I assume i

That X-37 photo in the wiki article had me go down the "payload fairing" rabbit hole. Still don't quite know what the "bubble wrap" is on the inside. I assume it is part insulation to protect from extreme heat and part, well, bubble wrap. According to wikipedia those things cost around $6 million to manufacture and spacex was the first to ever bother retrieving them. https://en.wikipedia.org/wiki/Payload_fairing https://en.wikipedia.org/wiki/Payload_fairing