投稿日：2018/04/21(土) 04:39
投稿者：Aaliyah　[home]　[mail]

I work here naturalnutritionals.com Space exploration is an expensive endeavor, in no small part because of the cost of the vehicles needed to actually get there. A Falcon 9 rocket runs about $54 million to build, according to SpaceX, while the fuel costs just $200,000, yet the rocket is only used once.