美国国家航天局罗曼空间望远镜：SpaceX二级火箭发动机点火开始

美国国家航天局（NASA）罗曼空间望远镜（Roman Space Telescope）：SpaceX二级火箭发动机点火开始

NASA Roman Space Telescope: SpaceX Second Stage Burn Begins

SpaceX猎鹰重型（Falcon Heavy）运载火箭二级上的梅林真空（Merlin Vacuum）发动机已重新启动，进行第二次点火，即SES-2。此次点火预计持续约两分钟。

The Merlin Vacuum engine on the SpaceX Falcon Heavy’s second stage has restarted for its second burn, known as second-stage engine start 2, or SES-2. The burn is expected to last around two minutes.

二级发动机关机（SECO-2）预计在T+8分28秒时发生。美国国家航天局（NASA）的南希·格雷丝·罗曼空间望远镜（Nancy Grace Roman Space Telescope）计划在大约五分钟后与二级火箭分离。

Second-stage engine cutoff, or SECO-2, is expected at about T+8 minutes, 28 seconds. NASA’s Nancy Grace Roman Space Telescope is scheduled to separate from the second stage about five minutes later.

通过以下渠道关注罗曼任务：

Follow the Roman mission at:

X: @NASARoman, @NASAUniverse, @NASAKennedy

X: @NASARoman, @NASAUniverse, @NASAKennedy

Facebook: @NASARoman, @NASAGoddard, @NASAKennedy

Facebook: @NASARoman, @NASAGoddard, @NASAKennedy

Instagram: @NASAGoddard, @NASAUniverse, @NASAKennedy

Instagram: @NASAGoddard, @NASAUniverse, @NASAKennedy