"It's just a matter of having enough Artemis launches to build the infrastructure on the Moon by then," he adds, referring to Nasa's Artemis spaceflight programme that aims to send people and equipment to the Moon.
The mission has already faced years of delays, and Nasa is under pressure to get the astronauts on their way as soon as possible. However, the US space agency said it would not compromise on safety.。业内人士推荐旺商聊官方下载作为进阶阅读
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"I believe we've had a problem here," said Swigert. Lovell had to repeat the message to a stunned Mission Control: "Houston, we've had a problem."