| UPDATED: 06:58, Fri, Dec 18, 2020 Link copied Sign up for FREE for the biggest new releases, reviews and tech hacks SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they'll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. SpaceX's last launch of the year has been delayed to Friday after ground controllers detected concerning tank pressures in the Falcon 9 rocket's upper stage. The mission comes hot on the heels of SpaceX's attempt to fly and land the Starship SN8 prototype last weekend. Today's mission has been NROL-18 and was meant to fly a secret satellite for the US National Reconnaissance Office (NRO).