SLS sunrise
NASA is planning a second attempt for the inaugural launch of the SLS on Sept. 3 after concluding a bad sensor led to the first scrub Aug. 29.

NASA has restarted the countdown for the first launch of its Space Launch System vehicle and Orion spacecraft after concluding a faulty sensor caused the first attempt to scrub earlier in the week.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...